Prolonged low velocity wave was recorded.
持续的低流速波。
It is shown that impulse direction has a great effect on velocity wave.
脉冲作用方向对脉冲作用点的速度波影响很大。
A velocity wave and a stress wave resulting from the stress variation are transmitted downward along the drill string.
悬点的应力变化产生速度波和应力波沿钻杆向下传递。
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