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The support with bolt and cable is a main way of roadway drivage.
锚杆锚索支护是巷道掘进的一种主要形式。
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The cut way and hole parameters affect the drivage efficiency and cost.
槽方式及布孔参数影响着掘进效率和成本。
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The cut way and hole parameters affect the drivage efficiency and cost.
槽方式及布孔参数影响着掘进效率和成本。
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