The time history of water hammer in pipeline in the condition of unit emergency load dump is calculated by characteristic line method.
在水电站机组丢弃负荷情况下，利用特征线法计算管道内的水击荷载时间历程。
A 5-lb hammer clutched in his right hand, he was attempting to disassemble a spindle unit from a late model Mazda.
他的右手上抓着1个5磅的锤子，正试图在一个新型的马自达上拆下一个主轴部件。
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