Elements of stonework excavation: Use down-hole drill assisted with hammer drill drilling. Control blasting loosely and side slope molding smoothing wall blasting.

石方开挖施工要点：采用潜孔钻机配以凿岩机钻眼，松动控制爆破和边坡成型光面爆破。

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May operate air-track, rotary, down-the-hole or other drilling machines to drill blast holes or may direct drilling of blast holes.

操作空气运作轨道，旋转，向下钻孔机或其他钻探机钻爆破洞或直接钻爆破洞。

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To achieve high efficiency energy - saving, the hydraulic design of technological innovation is applied to the light down the hole drill.

将液压设计技术创新性地应用于轻型潜孔钻机中，实现高效节能。

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Last week, rescue coordinator Andre Sougarret said initially the Schramm T-130, would be used to drill a 12-inch bore hole down to the miners to enable rescue workers to deliver larger survival items for the miners, but he said if possible the same drill would be used to widen the hole to 28 inches -- sufficient to hoist the miners back to the surface.

CNN: New drill arrives in Chile with great fanfare