and
Key words:
Tapered blade bits mainly include horseshoe chisel bit and oblique-chipway chisel bits and cross bits. Among these, the horseshoe chisel bits and the oblique-chipway chisel bits are mainly used for drilling small holes and short holes, and the cross bits are used for drilling long holes in hard and crack rock conditions. The tapered blade bits are mainly used in mining, quarrying, tunneling, bolting, etc.
Key words:
Hydraulic rock drill is driven by high pressure oil to complete energy conversion in the percussive drilling system.
Key words:
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