sandwich valve

例句：

1. 1. The engineer designed thenew machine with a sandwich valve to improveefficiency.
   工程师设计了这台新机器，带有一个三明治阀以提高效率。
2. 2. Theconstruction crew used a sandwich valve to preventwater from leaking into the basement.
   建筑工人使用了一个三明治阀以防止水渗入地下室。
3. 3. The manufacturer replaced the old sandwich valvewith a more durable model in order toextend the life of the equipment.
   制造商更换了旧的三明治阀，用更耐用的型号来延长设备的使用寿命。