seal-welded taper pipe threaded joint是什么意思

用法例句

Based on the reliability of the pipe string design and thread connection and sealing,this paper introduces the progress of the tubing and casing application technology and the problems that should pay more attention to in the process of application.

从管柱设计的可靠性和螺纹连接及密封的可靠性两方面介绍了油套管使用技术的进展及使用过程中应该注意的问题,并对国内企业在油套管使用技术方面需要展开的工作进行了展望。