“surface down-the-hole drill rig”的概念、定义、翻译、参考文献-科学参考

单词	surface down-the-hole drill rig
释义	surface down-the-hole drill rig Encyclopedia 工学〔露天钻孔设备〕释 surface down-the-hole drill rig露天潜孔钻机以冲击器潜入孔内直接冲击钻头破岩，而回转机构在孔外带动钻杆旋转，向矿岩进行钻进的钻孔机械。
随便看	length distribution function lengthen lengthening coefficient length functional length-limitation of staple fiber length-mass-time length measurement length measuring instrument length measuring sensor length modulation length of a curve length of a line segment length of an interval length of a queue length of arc length of a segment length of a sequence length of a series length of a string length of a vector length of a walk length of a word length of charge length of circumference length-of-day change of the earth

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