power-auger boring

Development and application of high power raise boring machine

强力反井钻机的研制及应用

Then the control system for boring the non-cylinder pin hole of piston was developed, whose main function modules including displacement ( detection,) temperature detection for thermal deformation compensation, constant current power and ( central) control unit.

然后研制了活塞异形销孔加工控制系统，包括主控、位移检测、热变形补偿温度检测和恒流源驱动等功能模块。

FCC Series Compensating Boring Power Head and the Boring Process

FCC系列补偿镗头及其镗孔工艺

And in a tiny junk shop full of broken wands, lopsided brass scales, and old cloaks covered in potion stains they found Percy, deeply immersed in a small and deeply boring book called prefects who gained power.

在一家堆满破破烂烂的魔杖、摇摇晃晃的铜天平和药渍斑斑的旧斗篷的旧货铺里，他们发现珀西正在聚精会神地读一本非常枯燥的书：《级长怎样获得权力》。

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 air drill 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。