4钻工钻井队有机械师 吗 ?Are there machinists in the oil - drilling group?钻工用合适的丝扣油涂抹接头母扣.The Floormen apply proper pipe dope into the thread box of the pipe joint.操作大钳时,必须教导钻工把手放在正确位置.The Floormen be instructed on proper placement...
The milky white fluid shown here in the peritoneal cavity represents a chylous ascites.图示:腹膜腔乳糜性腹水,呈乳白色.Gigolo even not come, Milky Way still flicker.牛郎即使不来, 银河依旧闪烁....the distant view of mountain ranges, white against a...