Wave upon wave of negative economic reports keep pushing the world markets down.
一波又一波的经济坏消息接踵而来，促使全球股市大幅走低。
All wave energy changes polarity from positive to negative with each cycle of the wave.
所有的波浪能量变化的极性从积极的消极每个周期的浪潮。
The negative pressure wave method was proposed for a pipeline leak detection system.
采用负压波法检测管线泄漏信号。
In this paper, the negative pressure wave method for pipeline leak detection and location of.
本文研究了负压波法在管道泄漏判断和定位中的应用。
In this paper, the negative pressure wave method for pipeline leak detection and location of.
本文研究了负压波法在管道泄漏判断和定位中的应用。
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