Pumps work, should pay attention to check the pressure, temperature and mechanical seals work.
泵工作时，应注意检查压力、温度和机械轴封的工作。
They were plain pumps. "Thanks," I said. "They're just my work shoes."
我穿着普通的轻便鞋。“谢谢，”我说：“这不过是我的工作鞋。”
The simple pumps can work with the help of air pressure.
简单水泵借助于空气压力而工作。
The simple pumps can work with the help of air pressure.
简单水泵借助于空气压力而工作。
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