这样做有必要以避免水锤或冲击损坏。
活塞型的水锤消除器应该可以接近或设检查口。
The piston type unit should be accessible or be provided with an access panel.
介绍了新型止回阀的防水锤结构特性和装配方法。
Introducing the structure characteristic with resistance hammer and assembly method of new type check valve.
过于严重的反压力、冰冻或水锤扭曲了第二止回阀。
Excessive back pressure, freezing, or water hammer has distorted the second check.
过于严重的反压力、冰冻或水锤扭曲了第二止回阀。
Excessive back pressure, freezing, or water hammer has distorted the second check.
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