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

Model

Outer diameter of heel tube  mm

Inner diameter of heel tube  mm

Reaming size  mm

Minimum diameter of inner hole of tube shoe mm

Maximum diameter of drill bit that can pass through mm

With impactor

ZRHG168

168

148-155

184

140

140

ZRC5 series

ZRHG178

178

158-165

194

148

148

ZRC5 series

ZRHG183

183

163-170

198

156

156

ZRC5 series

ZRHG219

219

199-206

231

188

188

ZRC6 series

ZRHG273

273

251-257

300

241

240

ZRC8 series

Characteristics of ZRHG series of tubular drilling tools

For the development of the ground source water well market, it has simple structure, high efficiency, high hole straightness and high precision, which saves a lot of cost for customers.