external screw gauge 中文意思是什麼
external screw gauge
解釋
外螺紋檢查規-
Metric external taper screw thread and mating internal parallel screw threads - part 2 : gauging system, use of gauges, calculation of gauge dimensions and general features
米制錐形外螺紋和配對圓柱形內螺紋.第2部分:量規系統
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