The drill rigs are a kind of fast drilling equipment which is rotated by an air motor, pushed by one or two air cylinders and the low or middle air pressure DHD hammer could be used.

• 该类钻机是由风动马达驱动回转，单、双气缸直接推进，低、中风压潜孔冲击器快速钻凿的穿孔设备。