Mechanized working line for the construction of the bedding rock section, blast of the grain side, technology of coal exposure etc.
还介绍了基岩段施工时的机械化作业线，光面爆破，揭煤工艺等。
Mechanized working line for the construction of the bedding rock section, blast of the grain side, technology of coal exposure etc.
还介绍了基岩段施工时的机械化作业线，光面爆破，揭煤工艺等。
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