精品人妻久久久久久888,久久久久亚洲AV成人无码电影,亚洲免费在线不卡高清视频,中文无码一区二区不卡AV,精品国产你懂的在线观看,日韩精品中文字幕有码,在线看片日本一区二区,成a人片在线观看久亚洲,亚洲无AV码一区二区三区,国产高清精品在线一区二区

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.