standard screw thread gauge
special screw thread gauge 特种螺纹量规 standard screw thread gauge 标准螺纹规 ; 标准螺纹量规 screw thread plug gauge 螺纹塞规 ; 罗纹界限量规 ..
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standard screw thread gage
标准螺纹量规 standard screw thread gage; standard screw thread gauge 标准螺纹形状 normal thread form .
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