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

ZRQ115C-DHD340 drill bit technical parameters

Model

Edge teeth

Middle tooth

Head structure

Number of exhaust holes

Number of splines

Weight kg

With impactor

ZRQ115C-DHD340

7-Φ16Q

6-Φ13Q

Plane

2

8

8.2

ZRC4A

ZRQ115CZ-DHD340

7-Φ16Q

6-Φ13Z

Plane

2

8

8.2

ZRQ115C-DHD340 drill bit features

ZRQ115C-DHD340 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

Seven 16mm alloys improve the wear resistance and fracture resistance of the alloy, and the bit body adopts 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.