The service conditions of the international high-pressure natural gas transmission pipeline, pipeline steel and welded pipe at present are introduced.
介绍了现代国际上高压输送天然气管道，管线钢及焊管的使用情况。
The service conditions of the international high-pressure natural gas transmission pipeline, pipeline steel and welded pipe at present are introduced.
介绍了现代国际上高压输送天然气管道，管线钢及焊管的使用情况。
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