短語詞組短語thread form angle 牙型角thread profile angle 牙型角screw -thread angle 螺紋角thread tooth link angle 牙形角micro fiber thread angle 微纖絲角half of thread angle 牙型半角screw thread angle 螺紋角normal thread angle 垂直螺紋齒形角screw thread angle gage 螺紋角槼 返回 thread angle