成人午夜精品无码区久久青龙-成人午夜精品无码区久久樱花影视-成人午夜精品无码区毛片四季视频-成人午夜精品无码区全集观看-成人午夜精品无码试看120秒-成人午夜精品无码网站

ZRQ165B-DHD360 drill bit technical parameters

Model

Edge teeth

Middle tooth

Head structure

Number of exhaust holes

Number of splines

Weight kg

With impactor

ZRQ165B-DHD360

9-Φ18Q

9-Φ16Q

Plane

3

8

25

ZRC6

ZRC6A

DHD360

COP64

ZRQ165B-DHD360 drill bit features

ZRQ165B-DHD360 drill bit is a universal drill bit developed by our company according to the characteristics of domestic rock formations, and its side teeth are adopted

Nine 18mm alloys. Due to the use of 3 powder discharge troughs and the application of larger alloys, it is relatively

The service life and work efficiency of conventional ZRQ165G drill bits have been greatly improved.