whitworth form of thread的意思|示意

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惠特沃斯螺纹

惠氏螺纹牙样 ... whitworth form of thread 惠氏螺纹牙样 whitworth screw thread 惠氏标准螺纹; 惠氏螺纹 whitworth standard screw thread 惠氏标准螺纹 ...