constant pressure unit

例句：

1. 1.The constant pressure unit is used to measure the pressure of gases.
   常压单位用于测量气体的压力。
2. 2.The constant pressure unit is essential for maintaining a safe environment.
   常压单位对于保持安全环境至关重要。
3. 3. The constant pressure unit is used in various industries to monitor and control gas flow.
   常压单位在各个行业被用来监测和控制气体流动。