常見例句雙語例句Due to the increasing number of deep wells and directional wells being drilled, longitudinal fracture occurred on the box-ended drill pipe tool joint is often reported.近年來由于深井、定向井等逐漸增多，油氣井鉆井中鉆桿內(nèi)螺紋接頭縱向開裂失效成為常發(fā)事故。 返回 tool joint box