covert conditioning
... covert coating 阔幅线呢; 芝麻呢 covert conditioning 内隐条件法 covert coverage 隐性采访 ...
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本文用混合隐式特征线法求解了井内流道中的瞬态波动压力问题，给出了弹性管和可压缩流体在井内各流道组合的压力波波动方程和定解条件。
By using the combined implicit characteristic line method, the calculation of the transient surge pressure in the flow conduit of a drilling well has been resolved in this paper.
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