Form Clearance (cF) is the radial depth of involute profile beyond the depth of engagement with the mating part.
齿形裕度：齿形裕度(cF)是相互配合的内、外花键的渐开线齿廓超过结合部分的径向距离。
Form Clearance (cF) is the radial depth of involute profile beyond the depth of engagement with the mating part.
齿形裕度：齿形裕度(cF)是相互配合的内、外花键的渐开线齿廓超过结合部分的径向距离。
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