low-pressure expansion machine

例句：

1. 1. The low-pressure expansion machine is used to expand the gas.
   低压扩张机用于膨胀气体。
2. 2. The low-pressure expansion machine is an essential tool for refining oil.
   低压扩张机是精炼石油的必备工具。
3. 3.The low-pressure expansion machine is widely used in various industries.
   低压扩张机在各行各业中都有广泛应用。