down-the-hole shaft boring machine的意思|示意
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英 / /
井下轴镗床
down-the-hole shaft boring machine的网络常见释义
井筒掘进机 ... down-the-hole hammer 液动潜孔锤 down-the-hole shaft boring machine 井筒掘进机 down-the hole corrosion 井内腐蚀 ...