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.
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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