Problems were introduced in the use of pressured proportional foam mixer. The notice of its design and type selection was discussed also. Its advantages were described in fire control.
介绍了压力比例泡沫混合装置使用中出现的问题和设计、使用选型应注意的事宜，消防中使用该装置的优越性。
2
The reference opinion for the selection principle of the proportional valve has been put forward.
对比例阀的选用原则提出了参考意见。
3
Yuken brings cutting edge electro-hydraulic control technology to you through their extensive proportional valve selection.