标准规范文件：ISO 21771-2007.pdf

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1、INTERNATIONALISOSTANDARD21771Firstedition2007-09-01Gears—Cylindricalinvolutegearsandgearpairs—ConceptsandgeometryEngrenages—Rouesetengrenagescylindriquesàdéveloppante—ConceptsetgéométrieReferencenumberISO21771:2007(E)©ISO2007ISO21771:2007(E)PDFdisclaimerThisPDFfilemaycontainembe

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6、gWebwww.iso.orgPublishedinSwitzerlandii©ISO2007–AllrightsreservedISO21771:2007(E)ContentsPageForeword............................................................................................................................................................iv1Scope..............

7、.......................................................................................................................................12Normativereferences...........................................................................................................................

8、13Symbols,subscriptsandunits...................