velocity of s wave 横波速度为
the velocity of ultrasonic S-wave 横波速率
structure of s wave velocity s波速度结构
peak value of S-wave velocity 横波速度最大值
However, the velocity of S-wave in a rock block with a large plane can be measured with the probes for P-wave.
对具有较大平面的岩块，可以利用纵波探头测定横波速度。
Whatever the straight line part of the stress-strain curve may be, it is always possible to find out the rock stress threshold by the peak value of the S-wave velocity.
试验结果表明：不论应力应变曲线上的直线部分是否明显，都可以用检测横波速度最大值的办法确定岩石的应力门槛值；
For the tight sandstone containing gas, only velocity ratio of P wave to s wave and Poisson ratio are sensitive to fluid variation.
而对于致密含气砂岩，纵、横波速度比及泊松比对流体变化相对较为敏感。
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