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.
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.
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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