管路上的各种阀门在安装前要拆开清洗，检查阀柄是否灵活，并经试压不漏后方可安装。

Take apart all valves along the pipeline for washing before installation, check whether valve handles are flexible. The valves can be installed after passing the pressure test.

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柄和休息能有一个微小的小腊烛，因此，一经他们适当地被压，他们将会难以分开。

The lug and recess can have a slight taper, so once they are pressed in place, they will be difficult to separate.

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柄和休息能有一个微小的小腊烛，因此，一经他们适当地被压，他们将会难以分开。

The lug and recess can have a slight taper, so once they are pressed in place, they will be difficult to separate.

youdao