The installation 1, Qudiao flange end of the Flange-connection fixed ball valve protective cover on both sides, in the valve fully open state to wash clean.
安装1、取掉法兰端两边的保护盖，在阀完全打开的状态下进行冲洗清洁。
The installation 1, Qudiao flange end of the Flange-connection fixed ball valve protective cover on both sides, in the valve fully open state to wash clean.
安装1、取掉法兰端两边的保护盖，在阀完全打开的状态下进行冲洗清洁。
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