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。
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。
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。
The wire-line directional drilling and coring technology can take cores and drill directionally without using down-hole motors.
绳索取心技术因其钻进效率高而广泛应用，但其无法实施定向作业。
Drill stem test plays an important role in drilling operation. It is easy to fail or to cause complicated down hole situations if conducted improperly.
中途测试在钻井施工中具有重要的作用，如果测试措施不到位，容易导致测试失败或发生钻井复杂情况。
Removing dust in the down-the-hole drill is very important in lengthening the service life of drill and assuring the health of workers.
潜孔钻机除尘系统对于延长钻机使用寿命，保证作业人员的身体健康至关重要。
Used with our down-hole hammer, it can drill through complicated formations in which drilling holes are easy to collapse.
配合我厂生产的潜孔锤，可以钻穿复杂，易坍塌底层。
The rock-drilling jamming mechanism of down-the-hole drill is discussed.
对潜孔钻机卡钻机理进行了探讨。
The rock-drilling jamming mechanism of down-the-hole drill is discussed.
对潜孔钻机卡钻机理进行了探讨。
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