involute contact ratio渐开线: evolvent; involute重叠: one on top of another; overl ...系数: coefficient; ratio; modulus; ...重叠系数: contact ratio; overlap coefficient逻辑重叠系数: logical overlap coefficient下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:渐开线重叠系数，即可在微信中查询翻译
