介绍了一种使用专用法兰和变径短管封堵煤气管道停止老化管道运行的新方法。

This paper introduces the method of partition the normal gas transmission to stop the aged pipe transmission by using the special flange and reducing pipe.

youdao

介绍了一种使用专用法兰和变径短管封堵煤气管道停止老化管道运行的新方法。

This paper introduces the method of partition the normal gas transmission to stop the aged pipe transmission by using the special flange and reducing pipe.

youdao