英语语法分析

Three types of backpressure valves are diaphragm, spring and weighted lever.

有三种类型的回压阀，即隔膜式、弹簧式和负荷杆式。

This test pressure includes corrections for service conditions e. g. backpressure or high temperatures.

此试验压力包括工作条件如：背压和高温的校正值。

If you need to raise backpressure, the preferred solution is to add more screens and increase screw speed.

如果你需要升高背压，较好的方案是添加更多的滤网并增加螺杆速度。