成人区人妻精品-成人区人妻精品一区二-成人区人妻精品一区二欧美毛片-成人区人妻精品一区二区-成人区人妻精品一区二区不卡网-成人区色情综合小说

ZRQ90-DHD3.5 drill bit technical parameters

Model

Edge teeth

Middle tooth

Head structure

Number of exhaust holes

Number of splines

Weight kg

With impactor

ZRQ90-DHD3.5

6-Φ14Q

5-Φ12Z

Plane

2

8

4.3

ZRC3.5-DHD3.5

ZRC3.5A-

DHD3.5

ZRQ90-DHD3.5 drill bit features

ZRQ90-DHD3.5 drill bit is a universal drill bit developed by our company according to the characteristics of domestic rock formations, and its side teeth adopt 6

A 14mm alloy ensures the wear resistance and fracture resistance of the alloy. At the same time, the bit body adopts a special heat treatment process

Technology, effectively reducing the probability of damage such as breakage, chipping, etc., so that the bit body and the alloy life can be effectively matched,

Embodied the characteristics of long life and high efficiency.