外文翻译---尺寸控制.doc

附录附录1英文翻译DIMENSIONALCONTROLINTHEEARLYDAYSOFENGINEER,THEMATINGOFPARTSWASACHIEVEDBYMACHININGONEPARTASNEARLYASPOSSIBLETOTHEREQUIREDSIZE,MACHININGTHEMATINGPARTNEARLYTOSIZE,ANDTHENCOMPLETINGITSMACHINING,CONTINUALLYOFFERINGTHEOTHERPARTTOIT,UNTILTHEDESIREDRELATIONSHIPWASOBTAINEDIFITWASINCONVENIENTTOOFFERONEPARTTOTHEOTHERPARTDURINGMACHINING,THEFINALWORKWASDONEATTHEBENCHBYAFITTER,WHOSCRAPEDTHEMATINGPARTSUNTILTHEDESIREDFITWASOBTAINED,THEFITTERTHEREFOREBEINGA‘FITTER’INTHELITERALSENSEITISOBVIOUSTHATTHETWOPARTSWOULDHAVETOBEDONEALLOVERAGAININTHESEDAYS,WEEXPECTTOBEABLETOPURCHASEAREPLACEMENTFORABROKENPART,ANDFORITTOFUNCTIONCORRECTLYWITHOUTTHENEEDFORSCRAPINGANDOTHERFITTINGOPERATIONSWHENONEPARTCANBEUSED‘OFFTHESHELF’TOREPLACEANOTHEROFTHESAMEDIMENSIONANDMATERIALSPECIFICATION,THEPARTSARESAIDTOBETOBEINTERCHANGEABLEASYSTEMOFINTERCHANGEABILITYUSUALLYLOWERSTHEPRODUCTIONCOSTS,ASTHEREISNONEEDFORANEXPENSIVE‘FIDDLING’OPERATION,ANDITALSOBENEFITSTHECUSTOMERINTHEEVENTOFTHENEEDTOREPLACEWORNPARTSITALSO,HOWEVER,DEMANDST