安装前先试运行及进行压力试验，无异常现象可上线安装。

Trial operation and pressure text is necessary for the valve. Install the valve after there is no abnormal condition.

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安装前先试运行及进行压力试验，无异常现象可上线安装。

Trial operation and pressure text is necessary for the valve. Install the valve after there is no abnormal condition.

youdao