Periodical inspection and maintenance of water supply system, supplying pipe, tape and tank, drain pipe.

给水装置的管线、头、箱及排水管道的定期检查和维修。

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Periodical inspection and maintenance of water supply system, supplying pipe, tape and tank, drain pipe.

给水装置的管线、头、箱及排水管道的定期检查和维修。

youdao