pre-inlet valve 预启阀
pre urevaccuum valve 真空压力阀
Modulating pre-cooler air valve 预冷器冷却空气调节门
low pre ure valve 低压阀门
high pre ure valve 高压阀门
According to flow in a different, balanced spool valve the pressure can be pre-pressure, can also be a back pressure valve.
根据流向不同，平衡阀芯所受的压力可以是阀前压力，也可以是阀后压力。
The ZSFL Pre-action Alarm System is made by equipping the top of the outlet of the deluge alarm valve with a wet-type alarm valve of the same size.
ZSFL预作用装置是在本公司生产的雨淋报警阀出水口上端配接一套同规格的湿式报警阀构成的预作用报警装置。
Solenoid valve installation Pre-installation should refer to the product manual, whether it meet your application requirements.
电磁阀的安装使用安装前应参阅该产品的使用说明书，是否符合你的使用要求。
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