Ptt 大爆卦 | drain cover中文 - 前往 https://www.elegislation.gov.hk/hk/cap123I!en-zh-Hant-HK

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水管裝置、排水工程及廁所)規例》 - Cap. 123I Building ...

Building (Standards of Sanitary Fitments, Plumbing, Drainage Works and Latrines) ... fitted with a suitable close fitting cover; and.

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