本文讨论了管道流体瞬变过程中压力波在管道中阀门处的穿透和反射情况，导出了压力波在阀门处的穿透和射反系数。
The pressure wave penetration and reflection properitics at a valve, which is located in a conduit, are discussed, And the Penetration and reflection coefficients are derived.
反蛋白石是一种有着微管道结构的薄片，它表面张力系数不同的液体非常的敏感。
The inverse opal is a chip with micro-channels sensitive to liquids of specific surface tensions.
最后，反求轨道误差和位系数误差对重力梯度测量值的影响。
Finally, the influence of orbital errors and potential coefficient errors on the gravity gradient measurements are conversely found out.
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