The permeability value is magnitudes 2–4 lower for the laboratory scale against the engineering scale.

确定实验室尺度较工程尺度而言，煤岩介质渗透率低2～4个数量级。

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The permeability value is magnitudes 2–4 lower for the laboratory scale against the engineering scale.

确定实验室尺度较工程尺度而言，煤岩介质渗透率低2～4个数量级。

youdao