Two design program methods on inside tapered thread (left- ha nd)of the normal drill -pipe joint . They are cutting thread (G32) and fixed cyc le of threading(G82). They completed cutting thread machine, they are new machi ne way and track.是什么意思_Two design program methods on inside tapered thread (left- ha nd)of the normal drill -pipe joint . They are cutting thread (G32) and fixed cyc le of threading(G82). They completed cutting thread machine, they are new machi ne way and track.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句