Dr. Mach
Contents
1. spring arm upwards as much as possible so the spring is without charge Insert a slotted screwdriver into the screw B Turn the adjusting screw to the right clockwise until the lamp holds its position at every set height 7 3 Maintenance of the segment e Dismount the lamp head in reverse order of mounting see chapter 5 2 e Check the thickness of the segment It must be at least 1 5mm In case the thickness of the segment is less than 1 5mm it has to be changed e Grease the segment and the coupling journal of the lamp e Mount the lamp to the spring arm see chapter 5 2 Rated voltage 8 Data 8 1 Technical data Ceiling attachment 120V 230V Rated frequency 50 60Hz Power consumption 50W Rated current at 24V 4 8A Protection class 59860001 Edition 06 15 04 2003 Bak Page 16 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering The device is not suitable for use in combustible blends of anaesthesia agents with air or for use in combustible blends of anaesthesia agents with oxygen or nitrous oxide The device is designed for continuous operation 8 2 Environmental conditions Operation Temperature 10 C 40 C Relative atmospheric humidity 30 75 Air pressure 700hPa 1060hPa Transport storage Temperature 10 C 40 C Relative atmospheric humidity 30 75 Air pressure 700hPa 1060hPa 9 Disposal The ceiling attac2. 6 15 04 2003 Bak Page 3 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 1 Safety instructions The lamp must not be connected to the mains until it has been fully assembled and installed This device is not suitable for use in hazardous locations The devices are not suitable for use in combustible blends of anaesthesia agents with oxygen or nitrous oxide Repairs to the ceiling attachment and special installation work on the sliding contacts should only be carried out by ourselves or a company expressly authorised by ourselves The manufacturer is only responsible for operational safety of the ceiling attachment when repairs and modifications are carried out by his own staff or by persons who guarantee compliance with the safety regulations The manufacturer is not responsible for damage to persons or property caused by incorrect or improper use or when used for incorrect purposes General information These installation instructions must be kept at hand together with the relevant operating instructions for consultation at any time All Dr Mach lamps are supplied with a flange with a graduated circle diameter 270mm and six bores diameter 15mm The flange supports the vertical suspension tube It is attached to the solid ceiling by means of a ceiling anchorage ring Remark The ceiling anchorage ring has to be ordered separately The ceiling anchorage ring has six precisely positio
3. Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering Mounting instructions Directions for use CEILING ATTACHMENT MACH 120 130 Ceiling lamps Mach 120 viicctiscsssccottccenszedennece Order No 120 110 3330 Mach 1200F Order No 120 220 3330 Mach 130 0 cece eeeeee ees Order No 130 120 3330 Mach 130F ce cece sees Order No 130 230 3330 Dr Mach GmbH u Co Flossmannstrasse 28 D 85560 Ebersberg Tel 49 0 8092 2093 0 Fax 49 0 8092 2093 50 Internet www dr mach com E mail info dr mach de 59860001 Edition 06 15 04 2003 Bak Page 1 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering List of contents As Safety MSUUCHOMS asec sssie sed cccecte cehetenes ete AEAEE Page 4 2 Mounting layout Celling lamps eesin sii ea a E A E EA Page 5 3 Coiling Attachments eiua aAA EAE Page 6 3 1 Preparatory work on the CeiING cc eeeeeeeeeeeeeeeeeeeeeeeeeeeeaeeeseeeaeeeseeeaeeetenaaeeeeeeeaaeees Page 6 3 1 1 Setting the safety dowels sssri isisi earann aoin ti eaaa iTia eiia dia aA Page 6 3 1 2 Mounting the ceiling anchorage ring to the Solid CellING orata TAAA AERAR SS AAA DEAA TARERE Page 6 3 2 Pre assembly of the ceiling flange and suspension tube ssseeeesereseerresereresee Page 7 3 3 Mounting the flange and the suspension tube to the ceiling ee eeeeeeeeeeeeteeeeees Page 8 3 4 Min roomheights for ceiling attachments eeeeseseeeeeeeerreseerreserreserrrssrernssrtrreseren
4. a torque wrench 25 Nm Note Washers C insulating washers D and retaining washers E must be put on the flange in the same order as shown in the figure e Verify balance with a spirit level 59860001 Edition 06 15 04 2003 Bak Page 8 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering Type with ceiling anchorage ring and Intermediate flange Ki Z e Screw three nuts G each 120 to the plate of 4 eile XR the ceiling anchorage ring the other three 1cm Cal 3 away from the plate unscrew nuts F LKR COOGEE A OK e Position the intermediate flange on the ER ROI KR Sse ace threaded bolts and adjust it to the required PRTSIEEPRE RP SISA SIE SERIEI we IS height using three nuts F and washers H Tp TT e Then position all six nuts G gently against the A intermediate flange from above aans TD ee e Screw on the remaining three nuts F with washers H and tighten all six nuts equally cross wise with a torque wrench 25 Nm neea e Verify balance with a spirit level For mounting the flange to the intermediate flange proceed as described at the design with ceiling anchorage ring 3 4 Minimum room heights for ceiling attachments Example lamp Mach 130 RHmin 59860001 Edition 06 15 04 2003 Bak Page 9 20 Lamps and Engineering Ceiling attachment Mach 120 130 Dr Mach Room heights H single ceiling lamps Hmin depending on ceiling attach
5. alZn 65332023 _ with int flange o hi2 Washer 13 DIN ozgan ezra 06 12 Insulating washer 50281222 07 6 12 Blocking washer SK12 galZn Ss with int flange 08 1 Safety bolt Cs 50753203 o9 a S K eee 6 ____ Hexagonal head screw M6x16 DIN 933 141 6 Retaining ring B6 A2 DIN 127 ooo O OS 13 1 _ Canopy divided 50 450 50222208 optional _ 14 14 _ Ring50mm 50222202 S ao a e 028 1 eee P e onenn a esTeDOOS_ 18 6 Cover white S O E 19 1 Circlip Seegerin 74011014 20 1 Gibwasher 70nn S Levelling washer TAOTO Ns n 74013012 _ Ondal 1502738 23 1 Connecting cable 680 2000mm 50224001 i Di a 50223028 complete 25 1 Brake screw 74015007 26 2 Screw for cover M3x4 DI N 966 65412029 74015009 Sliding contact for new type swing Ondal T19694 E SE eea e 50751008 1000mm 32 1 Ceiingbracket _ __ soo caan 33 1 Springarm1 2kg 74861001 for Mach120 34 M ISpringam2 3kg 74861002 for Mach 130 Securing Emeni 74015006 Cellular rubber seal length 1430mm 50222209 Ring 50754201 Washer 50754202 Bolt 8x59 50753202 Lateral cover left 74015010 Ondal T37284 Lateral cover right 74015011 Ondal T38505 Cover white Screw M3x8 D7985 Lock washer A3 2 50754001 e N SS 59860001 Edition 06 15 04 2003 Bak Page 20 20
6. d ceiling The lamp weight and the tilt of the long articulated arm s require that this work is performed meticulously This refers particularly to the use of a certified hammer drill and to observe the drilling tolerances 3 1 2 Mounting the ceiling anchorage ring to the solid ceiling The scope of supply includes 270 1 attachment set consisting of e Six safety dowels Fischer FHA 12 50 galZn eer CE cage od e Mounting data Fischer See e Bore template a lt lt ee ae To attach the ceiling anchorage ring to a solid Soil AAN ceiling proceed as follows g procee e Drill the bore holes according to the figure diameter 12mm and at least 100mm deep with a certified hammer drill using the enclosed bore template You can also use the ceiling anchorage ring as a template In this case a second person may be needed to assist e Insert the safety dowels through the bores of the ceiling anchorage ring in such a way that the washers lie flat to the ring e Tighten the screws carefully using a torque wrench 25Nm Light weight ceiling panelling with a maximum thickness of 30mm can be bridged using the enclosed safety dowels For panelling thicker than T pn Il 30mm it is necessary to remove the panelling Bug before mounting 59860001 Edition 06 15 04 2003 Bak Page 6 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engi
7. e length of the intermediate flange is to be measured to the lower edge of the false ceiling Also in this case a ceiling anchorage ring has to be used for fixation 15 04 2003 Bak Page 4 20 Edition 06 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 2 Mounting layout ceiling lamps Type 1 Mach 120 Mach 120F 7 AIT r Ceiling anchorage ring a oe Flange Concrete ceiling Suspension tube Br cket A Spring arm Type 2 Mach 130 Mach 130F bee Ceiling anchorage ring 4 Flange Concrete ceiling aie T Lamp Suspension tube Ea N Xa x Bracket A Spring arm A A aN s SiE i ae k 44 LI u 59860001 Edition 06 15 04 2003 Bak Page 5 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 3 Ceiling attachment 3 1 Preparatory work on the ceiling 3 1 1 Setting the safety dowels Attention Lamps ceiling anchorage rings and intermediate flanges may only be attached to a ceiling of concrete strength class greater than or equal to B25 In case of light weight ceiling coverings the dowel anchor must be sunk completely into the concrete To bridge this space use long threaded bolts for attaching the ceiling tube In addition take care that neither suspension tube nor attaching elements come into contact with reinforcement components of the soli
8. etely mounted 59860001 Edition 06 15 04 2003 Bak Page 10 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 4 2 Position of transformer Dr Mach lamps External transformer Transformer Remark in the lamp housing Mach 120 120F For models with Mach 130 130F electronic transformer Uniflex potentiometer instead of change over switch Transformer included in extent of supply The lamp Mach 120 is delivered only with external transformer 4 3 Wiring diagrams TiO Ys z E EANNAN 1D 3 i a a ih gt J Transformer in the lamp housing Mach 130 Clamps on the flange Coupling with sliding contact on flange Fuses ON OFF switches Converter Transformer Light bulb heist ENO Ol BOON o kd YS a a iee Eee Co External transformer Mach 120 Mach 130 Ve 1 Fuses E z Pan rO 2 ON OFF switch 4 pole for emergency power 4 connection i 3 Transformer ain a Clamps on the flange Coupling with sliding contact on lamp Secondary ON OFF switch i Light bulb e e r gt SS o NOOB OO 59860001 Edition 06 15 04 2003 Bak Page 11 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 4 4 Ceiling lamps with external transformer Single phase transformer mounted on the flange lamps Mach 120 and Mach 130 View Piang The single phase transformer is already mounted a on the flan
9. g Before mounting the flange and the suspension tube assembly work on the ceiling setting the dowels or mounting the ceiling anchorage ring and possibly mounting the intermediate flange must be completed and all pre assembly work finished Type with ceiling anchorage ring e Screw three nuts B each 120 to the plate of the ceiling anchorage ring holding the other three nuts 0 5cm away from the plate unscrew nuts A e Position six washers C and six insulating washers D on the flange e Position the flange with suspension tube on the threaded bolts and adjust it to the required height using three nuts A and washers C insulating washers D and retaining washers E each 120 Note Washers C insulating washers D and retaining washers E must be put on the flange in the same order as shown in the figure e The three point mounting allows a simple vertical adjustment of the suspension tube Vertical adjustment is very important and must be carried out with great care If the flange with suspension tube is not in the correct vertical setting the support arms of the lamp do not remain precisely in the proper position they could turn away and would therefore require excessive braking e Then position from above all six nuts B gently against the flange e Screw on the remaining three nuts A with washers C insulating washers D and retaining washers E and tighten all six nuts equally cross wise with
10. ge At delivery it is already connected to the line clamp Tr You have to connect the power supply and the lamp to the line clamp see wiring Transformer ee Line clamp Wiring gt Z A Vi A A L AIG Z Q 5 Mounting the articulated arms and the lamp head 5 1 Mounting the articulated arms to the suspension tube C gt D To mount the articulated arms proceed as follows e Loosen the screw 1 e Remove cover 2 including the sliding contact Suspension tube plug 4 e Remove circlip 3 gib washer 4 and levelling washer 5 from the suspension tube tool mounting plier e Slide the articulated arm onto the suspension tube e Slide the levelling washer gib washer and circlip onto the suspension tube in the correct order Take care to ensure that the nose of the gib Articulated arm washer lies on the lateral bore not shown of the suspension tube and that the safety ring slots properly into the groove of the suspension pipe tool mounting plier e Place the cover 2 back on the articulated arm and screw on with screw 1 59860001 Edition 06 15 04 2003 Bak Page 12 20 Lamps and Engineering Ceiling attachment Mach 120 130 Dr Mach 5 2 Mounting the lamp to the spring arm ATTENTION Notice the rated voltage information Coupling journal ow e Sticker with voltage information Each lamp has a red sticker applied near the coupling journal at the lamp bow The sticker shows t
11. he rated voltage of the lamp Connect the lamp only to the prescribed voltage to avoid irreparable damage e g the electrical components Following rated voltage is usual After mounting the lamp take off the sticker and dispose it otherwise it could fall down in the OT field after some time 59860001 Edition 06 15 04 2003 Bak Page 13 20 Ceiling attachment Mach 120 130 Do not remove screw 13 it is designed to fix the sliding contact and provides earthling 59860001 Edition 06 Dr Mach Lamps and Engineering Attention If the spring arm is pushed downwards the arm is under spring tension it may bounce up and cause harm While mounting the lamp head no other persons are allowed to be within the swivel range of the spring arm Mounting the lamp Mach 120 120F to the spring arm e Loosen brake screw 1 so the plastic bushing 2 can be slipped easy onto the spring arm e Slip plastic bushing 2 onto the spring arm to overlap slots 3 Check if the journal 4 of the lamp is greased Insert the greased journal 4 of the lamp and insert security segment 5 completely into slot 3 so that the security segment leads in groove 6 Rotate plastic bushing 2 by 180 up to the provided drilling for the brake screw and screw in brake screw 1 until you reach the desired brake effect for lamp head 4 Check if lamp head 4 is firmly fixed Mounting the lamp Mach 130 130F to the spring arm Loosen brake sc
12. hments do not contain any danger goods The components of the ceiling attachment should be properly disposed at the end of its shelf life In order to respect all regulations for disposal please contact us before disposing the product 10 CE mark The products ceiling attachment comply to the EMC standards 93 42 EEC for medical products of the European Community s Council 59860001 Edition 06 15 04 2003 Bak Page 17 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 10 Dimensions and range of movement Rmax 1800 800 59860001 Edition 06 15 04 2003 Bak Page 18 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 12 Spare parts 2 i 4 BORIS ROS EOS OOSs 3 VIRAIS IRTE RTRT IRAP Blago lapal OORT RADE RRO RAY E Z 1 SORES ALOE RAND ZR Ue AS 4 5 6 7 SS A aS 10 11 SHS PAZZA 12 13 39 42 14 17 18 16 24 21 20 mm 19 Mach 120 Mach 130 T gt 32 27 28 a ze YO 21 B a 19 a ae 33 34 40 41 59860001 Edition 06 15 04 2003 Bak Page 19 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 13 Spare parts list Item Pcs Name EDVNO Remarks __ Ceiling anchoring ring TK 270 50480001 sd 02 6 Safety dowels for ceiling anchoring ring 74011018 03 1 peeing flange TK 270mm 50482301 __ 12 24 Nut M12 DIN 934 8 g
13. ien a ieira Page 17 9 Disposal s ccti inci esate ieee ei Nie ee eee Page 17 10 CEs MaK orien i aa Ghee di ck ial dedi Ae NE nen eee ee Page 17 11 Dimensions and range Of MOVEMENT eecceeeeeee eee etee eter ente seer taeeeeetaeeeee teaser tieeeeeee Page 18 12 Spare Pants een eee ota ee ao ad tee eh a ae Page 19 13 Spare parts list E E EEE adee Maecenas ted aie eee ee Page 20 59860001 Edition 06 15 04 2003 Bak Page 2 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering Static inspection Note The static structural inspection must be carried out before the installation of the ceiling or wall anchorage The strength of the construction must be designed checked and certified by a structural engineer The respective regional construction regulations that apply must be followed If a wrong hole is drilled by mistake e g drilling of a reinforcement rod the structural engineer who is responsible must be contacted since adequate static load distribution in the ceiling may have been endangered Declaration of acceptance It is hereby certified that the supporting ceiling wall and the ceiling anchoring wall anchoring is safe and adequately strong Project Anchoring please check the one that is applicable with dowels authorized by construction authority with counter plate a other Location Signature Stamp structural engineer construction authority 59860001 Edition 0
14. lamp cannot be switched on again 7 1 Periodical maintenance work The following maintenance work tests has have to be done every six months e check on defects in paint work e check on fissures at plastic parts e check on deformation of the suspension The following maintenance work tests has have to be done once a year e check the function e electrical safety test e check the suspension Remark Check and grease the security segment once a year 59860001 Edition 06 15 04 2003 Bak Page 15 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 7 2 Adjusting the spring force Springs are wearing parts thus the spring force can decrease in time and must be readjusted Note Set the spring force in such a way that the spring arm with the lamp head holds its position at every set height In case the spring arm with the lamp moves down on its own proceed as follows Remove lateral cover A The adjusting screw B for the spring force is visible now Push the lamp and spring arm upwards as much as possible so the spring is without charge Insert a slotted screwdriver into the screw B Turn the adjusting screw to the left anticlockwise until the lamp holds its position at every set height In case the spring arm with the lamp moves up on its own proceed as follows Remove lateral cover A The adjusting screw B for the spring force is visible now Push the lamp and
15. ment Mach 120 Mach 120F Mach 130 Mach 130 with ster handle sleeve Min room height in the case of ceiling attachment with shortest suspension tube 180mm 4 Electrical connection 4 1 Preparing the electrical connection Extent of supply e Cable on the suspension tube e Line clamps on the flange Put the cable through the flange Ensure that the cables are cut to a length which allows approx 15cm cable to extend from the suspension tube The flange is fitted with line clamps for connecting the light system to the electrical circuit These clamps should be accessible for electrical safety checks during installation and also later Connect the mains supply and the cable from the suspension tube to the line clamps In case of lamps with external transformer the cross sections of the cables must be designed in accordance to the cable length and power consumption The following table shows the recommended cross sections Lead length m Power consumption Ww up to 20 up to 40 2 5 2 5 2 5 4 0 2 5 2 5 4 0 6 0 Cross section of lead mm Once the electrical connections have been completed check that the system functions correctly in a no load operation trial run When connecting to an external transformer the emerging voltage U will be approx 10 20 above rated voltage because of no load and anticipated lead losses There is no point in making any adjustments until the lamps have been compl
16. ne Page 9 A Electrical COMnNCCUOM aessa RR A e TA AS ARES A e TA E S aa DARE Page 10 4 1 Preparing the electrical connection a sssessresssrresssrnnssnnrnnssnnasnnnnnntnnnnnnnnnannananaanannna Page 10 4 2 Position of transformer Dr Mach lampS seessssssessesrrsseerresrrrrssrtrrssrrrrssrrrnssrreenne Page 11 4 3 Wining diagraMiS eeraa a rE ee E E E E A EE EEE Page 11 4 4 Ceiling lamps with external transformer sssseessssiresesrreserresttrrssttrnstternnsttnnsstennnnt Page 12 5 Mounting the articulated arms and the lamp head ssnsssseneessrrssesrrresrirrssrrresrtrnssrernssst Page 12 5 1 Mounting the articulated arms to the suspension tube eee eeeeeeeeeeeeteeeeeeneeeees Page 12 5 2 Mounting the lamp to the spring armM sssesesssesirssesrrssrerrssrtrrnsttnnsstrnnsttnrsstnnssrennne Page 13 6 GIGAMIN EEE E A E E E E E E E A E E E ete eta Page 15 AM AINTEMANICE iaaa aar A ATOAN EEEE ER EEEN Page 15 7 1 Periodical maintenance WOK ccccceeeeeeeeeeeceeeeseeeeeeeseneaeeeseeeaeeeseeeaeeeeseeaeeeeeeaaeees Page 15 7 2 Adjusting the Spring force rror sraa Ea EA lens cee ANNEER Page 16 7 3 Maintenance of the SEQMENE ec eee ee eete rete tenet ee tneee settee ee taeeeeetiaeeeeeeenaeeeer Page 16 DD e EP A oa setae ance cute E aca saute e I E ceca te EE ete tetera ieee eat dy Page 16 8 1 Technical data rerni iriaren i wiaee dan tlc end eae Page 16 8 2 Environmental conditions 000 0 eeeeeee cence ee iken
17. ned threaded bolts M12 It makes it possible to fasten and adjust the lamp without causing dust or dirt after all building work has been completed The use of a ceiling anchorage ring is necessary in all cases of ceiling attachments During mounting take care to ensure that neither the flange nor the attachment elements are in contact with reinforcement components of the solid ceiling In view of the slight weight of the Dr Mach lamps it is not fundamentally necessary to drill through the ceiling and use a _ counter plate Ceiling anchorage rings can be attached without any problems to ceilings in the concrete strength class greater than or equal to B25 using safety dowels M8 59860001 The forces arising when the widely extending articulated arms tilt do make it necessary to drill very carefully with a certified hammer drill paying close attention to the drilling tolerances The suspension tube of the lamp must be adjusted vertically to prevent the lamp body from moving For this purpose the M12 counter nuts on the attaching bolts must be adjusted accordingly In case of false ceilings the suspension tubes for all lamps can be mounted directly through to the solid ceiling The opening required for this purpose can be closed once the work has been completed using the canopy diameter 450mm or a covering plate When using an intermediate flange preferably for spaces exceeding 400mm and for room heights exceeding 4050mm th
18. neering 3 2 Pre assembly of the ceiling flange and suspension tube and installing the electrical connections The length of the suspension tube is adjusted to the required room height with a clearance height of at least 200cm under the lamp Aluminium cast flange and suspension tube 50mm M _ BE N IN 59860001 Standard version For pre assembly of ceiling flange and suspension tube proceed as follows e Cable or cord showing out the suspension tube is to be pushed carefully into the ceiling flange together with the suspension tube e Push the suspension tube upwards until the safety pin 1 can be pushed through the cross bores of the suspension tube e Then pull the suspension tube down until the safety pin 1 lies in recess A of the ceiling flange e Then secure the connection with six screws 2 and washers 3 to prevent wobbling If not possible turn suspension tube by 180 e Pull the cable or cord through the bore 4 as shown in the diagram Attention The suspension tube is delivered with premounted retaining ring for the ceiling canopy Each connection journal is also equipped with e 2 spacer rings e 1 gib ring e 1 circlip Seegerring Edition 06 15 04 2003 Bak Page 7 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 3 3 Mounting the flange and suspension tube to the ceilin
19. rew 12 so the plastic bushing 7 can be slipped easy onto the spring arm Slip plastic bushing 7 onto the spring arm to overlap slots 8 Check if the journal 9 of the lamp is greased Insert the greased journal 9 of the lamp and insert security segment 10 completely into slot 8 that the security segment leads in groove 11 Rotate plastic bushing 7 by 180 up to the provided drilling for the brake screw and screw in brake screw 12 until you reach the desired brake effect for lamp head 9 Check if lamp head 9 is firmly fixed 15 04 2003 Bak Page 14 20 Ceiling attachment Mach 120 130 Dr Mach Lamps and Engineering 6 Cleaning Note Before doing any cleaning work turn off the lamp disconnect from mains and make sure that the lamp cannot be switched on again Please ensure that no disinfection liquid flows into the joints or lamp head The surface of the ceiling attachment can be easily kept clean by simply wiping with a wet cloth You can use conventional cleaning agents Caution In order to prevent any damage at plastic parts do not use scouring agents or alkaline acidic and alcoholic cleaning agents For cleaning proceed as follows e Draw plug from mains e Wipe the surface of the ceiling attachment with a wet cloth As a cleaning agent you can use water or a soap solution washing up liquid 7 Maintenance Note Before doing any maintenance work turn off the lamp disconnect from mains and make sure that the
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