国产精品不卡av在线观看,久久综合九色综合欧美狠狠,又粗又长又硬义又黄又爽,久久精品国产欧美激情无码

Shandong Zhongrui Construction Machinery Co., Ltd official website!

National Service Hotline:
15005366588
ZRQ165-DHD350 high wind pressure down-the-hole drill bit
ZRQ165-DHD350 high wind pressure down-the-hole drill bit
 
 

ZRQ165-DHD350 drill bit technical parameters

Model

Edge teeth

Middle tooth

Head structure

Number of exhaust holes

Number of splines

Weight kg

With impactor

ZRQ165-DHD350

8-Φ18Q

8-Φ16Q

Concave surface

2

8

17

ZRC6

ZRC6A

DHD360

COP64

ZRQ165-DHD350 drill bit features

ZRQ165-DHD350 drill bit is a kind of general purpose drill bit developed by our company according to the characteristics of domestic rock formations. Its side teeth are mining

 

Using eight 18mm alloys to ensure the wear resistance and fracture resistance of the alloy, and the large head adopts a concave layout.

 

The straightness of the drill bit during the drilling process is effectively ensured, and the bit body adopts a special heat treatment process, which effectively reduces the amount

 

Its breakage, collapse and other damage probability make the drill bit body and alloy life matched effectively, reflecting the high lifespan

 

The characteristics of life and high efficiency.

 

 
久6视频在线观看免费 | 朝桐光一区二区高清无码电影 | 日韩一区Av福利在线 | 色狠狠一区二区三区 | 人人添日日添夜夜添 | 日本中文A片理论片在线观看 | 国产女教师一爽A片 | 国产又粗又猛又爽又黄的刘涛视频 | 中文字幕永久字幕永久在线 | 熟女少妇一区二区三区 | 日本在线视频中文一区 | 91综合区亚一洲线观看 | 国内久久成人网站地址 | 又大又长又粗又硬又黄裸体毛片 | 搡少妇在线视频少妇干活了 | 三上悠亚在线一区二区三区四区 | 亚洲AV无码乱码A片秀色直播 | JapaneseAV高码AV| 四川少妇BBW搡BBBB搡BBBB 91人妻人人澡人人精品人人爽人人 | 亚洲色图丁香五月一区久久 | 日韩欧美最新一区二区三区在线观看 | 亚洲无码一区二区av | 日本一区二区三区免费观看 | 亚洲一区二区AV | 国产69精品久久久久久 | 三级片免费欧洲中文 | 河北真实伦对白精彩脏话 | 色综合高清无码在线 | 人妻少妇中文字幕久久牛牛 | 自慰喷水网站大全 | 午夜无码免费无A片又黄又硬 | 亚洲丝袜制服av | 国产精品JIZZ在线观看99 | 亚洲免费观看无码成人电影 | www.bbbbbbbb| 国产精品一区在线观看 | 免费视频中文2019在线播放 | 成人午夜在线观看 | 蜜桃AV秘 无码一区二区三欧 | 精品人妻少妇嫩草AV无码久久洗澡 | 人妻少妇一级A片 |