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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。
youdao
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Oh, by the way, if things get bad, just bolt, okay?
噢,顺便说一声,如果事情变糟了,赶快逃跑,知道吗?
youdao
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Oh, by the way, if things get bad, just bolt, okay?
噢,顺便说一声,如果事情变糟了,赶快逃跑,知道吗?
youdao