The definition of water hammer is the force that is created when a liquid suddenly changes velocity.
水锤的定义是指当液体突然改变速度时会产生一个力的作用。
The principles can be applied either in the calculation of water hammer in liquid or in the calculation of steam hammer in compressible fluid.
既适用于液体介质的水锤计算，也适用于可压汽体的汽锤计算。
Due to the differences of gas - liquid physical property, the key component of new pneumatic efflux hammer, namely, pneumatic efflux element, must be researched.
由于气液物性不同，故新型气动射流冲击器的核心部件——气动射流元件的切换性能需进行研究。
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