精品国产1 I 欧美黑人添添高潮a片www I 日韩精品无码一区二区三区久久久 I 日本三级片在线观看 I 欧美另类专区 I 一起操网址 I 天天色婷婷 I www蜜臀av I 日韩成人av电影在线 I 日本美女一区二区三区视频 I 欧美精品一区二区免费 I 亚洲最大黄色 I 日韩精品福利视频 I 97一区二区三区 I 又黄又免费的网站 I 极品福利视频 I 色天天操 I 伊人青青草视频 I 国模吧 麻豆 I 欧美成年黄网站色视频 I 伊在线久久丫 I 国产精品推荐 I 超碰在线看 I 免费一级欧美片在线播放 I 精品96久久久久久中文字幕无 I 色女孩导航 I 少妇又紧又色 I 暖暖爱免费观看高清在线遇见你

ZRQ90-CIR90 series drill bit technical parameters

Model

Edge teeth

Middle tooth

Head structure

Number of exhaust holes

Number of splines

Weight kg

With impactor

ZRQ90

6-Φ14Z

2-Φ12Z

Convex surface

2

6

3.9

　ZRC3.5-CIR90

　ZRC3.5A-CIR90

2-Φ13Z

ZRQ90B

6-Φ14Z(H)

2-Φ12Z

Convex surface

2

6

3.9

2-Φ13Z

ZRQ90C

6-Φ14Z(H)

2-Φ12Z

Convex surface

2

6

3.9

2-Φ13Z

Model features:

ZRQ90 drill bit is a conventional low wind pressure 90 drill bit.

ZRQ90B uses a more wear-resistant alloy on the basis of conventional drill bits.

ZRQ90C drill bits not only use better alloys, but also take targeted improvements in the bit body and heat treatment process.

The wear resistance and service life of the product are improved, and the probability of abnormal damage of the drill bit is greatly reduced. It is especially suitable for

ZRC3.5A-CIR90 fast impactor.