Pump units的用法和樣例：
例句
- The main component is a stand-alone chiller unit that must be connected by piping to a pump and a separate reservoir in order to function.
主要的組件是一個(gè)獨立的制冷機組，通過(guò)管道與泵和單獨的儲水槽連接。 - The roof is formed from standard steel sections and recyclable pre-cast concrete units.
屋頂是形成從標準型鋼可回收和預制混凝土組件。
