1.
Analysis and Application of Experiment Data of No.7-12 Pumping Water Drill in Changfushan Minefield
昌福山矿区7-12钻孔抽水实验数据的分析及应用
2.
Bored piling shall be used for the pumping station and bridges for the Projects.
钻孔式打桩应用于工程项目中的抽水站和桥。
3.
The Better Chosen of the Field Arrangement of the Drill Hole Pulls Out Putting Drills and the Drill Hole Parameter of the Coal Bed Gas in PanJiang Mining Area;
盘江矿区煤层气钻孔抽放钻场布置及钻孔参数优选
4.
Research on Bit for Efficient Drilling of Gas Drainage Borehole in Nantong Mining Area;
南桐矿区瓦斯抽放孔快速钻进钻头的研究
5.
Application of Triangular Drilling Rod to Gas Drainage Borehole Drilling in Medium Soft Seam
三棱钻杆在中软煤层顺层瓦斯抽排钻孔的应用
6.
drawer sides dowels cutting and holes drilling machine
圆棒榫截断及抽屉端部钻孔机
7.
Design for drawing out gas with high position boring at coal face
轻放工作面抽放瓦斯高位钻孔的设计
8.
Research on the technology of integrated interchange drilling to drainage gas
综合立体交叉钻孔抽放瓦斯技术研究
9.
Gas Drainage Technology of Goaf with Boreholes from Surface Ground of Tangshan Mine
唐山矿地面钻孔抽放采空区瓦斯技术
10.
Technology of 1000 meter directional borehole at large diameter for mine gas extraction
顶板大直径千米长钻孔抽采瓦斯技术
11.
Application of Bit Water Way in HDD
水平定向钻进扩孔钻头水口应用分析
12.
A Study of the Second Hole Sealing Method to Improve Gas Drainage in Coal Seams
煤层瓦斯抽放钻孔的二次封孔方法研究
13.
Study on Rational Borehole Space of Crossed Boreholes for Gas Pre-drainage
预抽煤层瓦斯交叉钻孔合理孔间距的研究
14.
rotary wash-boring equipment
旋转式水冲钻孔设备
15.
horizontal borehole pressure recorder
水平钻孔压力记录器
16.
Diamond Hill Fresh Water and Salt Water Pumping Station
钻石山食水及海水抽水站
17.
Gas drainage in seam with large auto variable diameter bore holes
自动变径大直径钻孔抽放煤层瓦斯试验
18.
Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face
综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究