vertical pipe的用法和樣例：
例句
- The backflow preventer must be supported and is not designed to carry full weight of the stand pipe.
防回流閥必須有所支撐，不能用于承載立管的全部重量。 - The installation of vertical water supply pipes on some floors does not consider the space necessary for the installation of fire and water protection items.
部分樓層的給水立管的安裝沒有考慮防火防水密封材料的安裝空間。
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