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。
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。
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。
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。
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。
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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