美洋洋童装店
很简单啊Module 模数Teeth number 齿数tooth profile 齿形角（也叫压力角）standard reference profile 标准齿形shifting coefficient 变位系数accuracy grade 精度等级total cumulative pitch tolerance 齿距累积总公差tolerance on tooth profile error 齿形公差（也叫齿廓偏差）helix deviation 螺旋线公差（旧标准也叫齿向公差）base tangent length 公法线长度teeth number in base tangent length 跨齿数over-rolls measurement 量棒距roll diameter 量棒直径tip diameter 齿顶圆直径root diameter 齿根圆直径pitch diameter 分度圆直径
