These phenomenon jeopardize the condition of the project seriously, and it is the main factor that influences the loss of local water head.

这些现象严重危害管道的工况，并且是影响阀道局部水头损失的主要因素。

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Ulteriorly, considering the local head loss in inlet opening and pipes junction plays more important role in the calculative results of water hammer pressure calculation of the short pipeline system.

考虑进口及多管道连接处的局部水头损失对短管道系统水击压强的计算结果影响较大。

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Actually, in the tube engineering, the proportion of the loss of local water head in the loss of pipeline water head is big.

在实际管道工程中，阀门阀道的局部水头损失占管路水头损失的比例是相当大的。

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