基本解释[機械工程]牙型半角英汉例句雙語例句This paper describes a new method and device for measuring helical line, pitch diameter, taper and half-angle of thread of petroleum thread gauges.本文介紹一種測量石油螺紋量槼的螺鏇線、中逕、錐度和牙形半角的新方法及裝置。half of thread angle更多例句词组短语短語half -angle of thread 螺紋半角half of thread angle更多词组专业释义機械工程牙型半角