The sequence of excavation for the shaft of diversion system at Pushihe storage power station is to excavate the pioneer well used by back well boring machine, then by hand airdrill to expand it.
蒲石河抽水蓄能电站引水系统中的竖井开挖，拟采用反井钻机进行导井开挖，人工手风钻钻孔扩挖的方式施工。
2
Suitable for broaching or tapping in the cabined place. The airdrill is light, good rigidity an can be used for drilling in reverse, aiguilles of which has short distance form the border to center.
用于狭窄部位钻孔，扩孔攻丝等作业，具有重量轻，刚性好，钻削头边心距小等特点，且可反转。
3
You need plenty of air so that you can take your time and experience what this drill has to offer.