A lot of documentation and materials at home and abroad concerning the mechanism of coal and gas is consulted and analyzed by the author according to this problem.
针对这一问题,参考分析了大量国内外关于煤和瓦斯突出机理理论与实验研究的文献资料。
According to this problem, we developed LH net resin covered sand for multi layers sand control.
为此开发了适合于多层防砂的LH网络树脂覆膜砂。
According to this problem, the solutions for different shut-in procedures are similar except for the initial conditions.
通过对该问题的研究,认为无论采用何种方式关井,其求解过程相似,只是初始条件有变化。
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