惠氏螺纹量规 Whitworth screw thread gauge 惠氏螺纹牙样 Whiworth form of thread ; Whitworthform ; Whitworthformofthread 英国标准惠氏螺纹 british Standard Whiworth Thread ; BSW BSF ..
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... Whittaker differential equation ==> 惠特克微分方程 Whitworth form ==> 惠氏螺纹牙样 Whitworth form of thread ==> 惠氏螺纹牙样 ...
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