putting-down machine

例句：

1. 1.This machine can effectively put down the fire.
   这台机器能有效扑灭火焰。
2. 2. The police used a putting-down machine to subdue the rioters.
   警方使用一台镇压机器来制服暴动者。
3. 3. The company has developed a new type of putting-down machine for the construction industry.
   该公司为建筑行业开发了一种新型的镇压机器。