Proportional valves can also be used to control pressure.
比例阀也可以被用来控制压力。
Safety relief valves shall be labeled for relief pressure rating.
安全减压阀要有标示，标明压力释放级别。
Before starting test, all needle valves on test kit must be closed.
在开始检测前，检测组件上的所有针形阀都必须关闭。
Gas valves will be supplied by customer.
气体阀门将由顾客供应。
Pacific Valves will be glad to advise you on your application.
美国太平洋阀门公司为用户的应用提供建议。
In order to guarantee the safety of nuclear power plants, reliable valves must be chosen.
为了确保核电站的安全，必须选用安全可靠的阀门。
Valves may also be automatic, driven by changes in pressure, temperature, or flow.
阀门也可能是自动的，在推动的变化由压力，温度或流量。
All needle valves must be closed on test kit.
检测组件上的所有针形阀都必须关闭。
When blast protection is required, a blast protection instrument, valves and sensors can be used.
当要求防爆时，可用防爆仪表、阀门和传感器；
All valves to be suitable for double block and bleed service.
所有阀门需有双堵塞和双排放功能。
These valves can be normally closed, normally open or universal.
这些阀门可以常闭，常开或普遍。
These valves can be normally closed, normally open or universal.
这些阀门可以常闭，常开或普遍。
应用推荐