上向式凿岩机 – English translation

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上向式凿岩机具有轴向伸缩机构钻凿上向炮孔的凿岩机。适用于采矿和天井掘进钻孔，可钻与水平成 60。 stopper 90。的上向孔，孔径为32stopper46mm, 最大孔深达6m

上向式凿岩机: 4 phrases in 1 subject

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