... the bit and rod, and the drill machine can choose the adaptor mounting.This machine is portable type, and it is ... , simple structure, easy maintenance etc.This machine is suitable for exploring, disgas, discharge water, water injection, release pressure, roof bolting, etc ... 13(square),18×18(square)Max. boring diametermm φ110Flush water pressureMPa 0.6~1.2 Portable Mounting Pneumatic Drill Machine