Have all the joints been coated with thread compound 所有接头都要涂上螺纹脂。
All the joints should be coated with thread compound 所有接头都要涂上螺纹脂。
We are coating the joints with thread compound 所有接头都要涂上螺纹脂了吗?
Thread compounds for casing , tubing and line pipe 套管油管和管线管用螺纹脂
Petroleum and natural gas industries - evaluation and testing of thread compounds for use with casing , tubing and line pipe 石油和天然气工业.与铸件管材和管道一起使用的螺纹复合物制件的评价和试验