基本解释[机械工程]牙型半角英汉例句双语例句This paper describes a new method and device for measuring helical line, pitch diameter, taper and half-angle of thread of petroleum thread gauges.本文介绍一种测量石油螺纹量规的螺旋线、中径、锥度和牙形半角的新方法及装置。half of thread angle更多例句词组短语短语half -angle of thread 螺纹半角half of thread angle更多词组专业释义机械工程牙型半角