符号的意义,一般遵从 :
The terms used, wherever applicable conform to
the following standards.
ISO 701:1998, International gear notation -- --
Symbols for geometrical data
ANSI/AGMA 1012--F90, Gear Nomenclature, Definitions
of Terms with Symbols
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还要 遵从 每个标准规范 ,例如 精度中 (ANSI7AGM.A 2000-A88) :
Vp ---- Pitch Variation