multiple unit valve

例句：

1. 1. The valves in this system are designed to allow multiple units to be controlled simultaneously.
   这个系统中的阀门被设计成允许多个单位同时被控制。
2. 2.The engineers worked on the design of a multiple unit valve for several months.
   工程师们花了几个月的时间来设计一个多重单元阀门。
3. 3. The new valve is an improvement over the old one, allowing multiple units to operate more efficiently.
   新的阀门比旧的更先进，允许多个单元更有效地运行。