The professional electricians are required on the installing process.

产品需专业人员进行安装。

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Clean the tube and the inside of the valve to remove anything else clung to the former during the installing process.

安装时，应清洗管道及阀门内腔，不允许有任何异物附着。

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This article introduces the installing process and analyses some difficulties in the installing process to give the reference for the trade.

文章简要阐述其安装过程并对一些难点进行剖析，以供同行借鉴。

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