The liquid in the pipeline under certain conditions and partially vaporizes into gas state, bubble, formation of gas-liquid two-phase flow which is the process of flash.
管道中的液体在一定的条件下，部分液体气化成气体状态，产生气泡，形成气液两相流这就是闪蒸过程。
in villages, the new pipeline marks the end of water as a precious liquid, to be dispensed frugally, weighed out drop by drop.
在农村，新的输水管道标志着水作为一种珍贵液体的年代的结束，水可以节省地分配到各处，可以一滴一滴地称量。
In this pump and export pipeline maintenance, the system will not happen in the liquid back.
这样在检修泵及输出管道时，系统中的液体不会发生倒流。
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