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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The drill tool has the advantages of capable of being used for drilling and tapping in a narrow space and the inside of a box part without using other devices, convenience and cost saving.

本发明具有以下效果：不使用其它设备，即可在隘小空间和箱体零件内部进行钻孔和攻丝，方便且节约成本。

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Compares with drill emission hole, the use of cutting method to against coal and gas outburst prominent have characteristics of security, time and labour-saving, and easy to operate.

与排放钻孔相比，使用掏槽法防突具有省时、省力、容易操作以及安全性好等特点。

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