1.
Application of Gas Drainage in Fractured Zone by Roof High-level Boreholes in Daping Coal Mine
顶板高位钻孔裂隙带抽放在大平矿的应用
2.
Application of Technology of High Gas Cannon Picking Roof Perforate Gas Administer
高瓦斯炮放面顶板钻孔法瓦斯治理技术应用
3.
Gas drainage technique by 1000 m long and large diameter roof boreholes in high gas coal seam group
高瓦斯煤层群顶板大直径千米钻孔抽采技术
4.
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
5.
Study on axial vibration drilling to improve positioning accuracy
轴向振动钻削提高钻孔定位精度研究
6.
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
7.
Fire Prevention Practice on Drilling Holes with Inclined Slices on Fully Mechanized Face Roof of Thick Seams in Junde Colliery
峻德矿特厚煤层综放面顶板下斜钻孔防火实践
8.
The deviational survey unit measures the parameters of the apex angle and the azimuthal angle of the bore hole;
测量单元用于测量钻孔的顶角与方位角等参数；
9.
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
10.
Drill a 12-mm (1/8-in) diameter hole in the top center of the fan shrou
在风扇围板顶部中心钻一个直径12毫米（1/8英寸）的孔。
11.
The Study on the Key Gas Drainage Technique by Long & large Diameter Roof Boreholes in Fully Mechanized Face
综采面顶板走向大直径长钻孔瓦斯抽采技术参数的研究
12.
Practice and Analysis of Tube Sheet Hardling with High-speed Internal Cooling Shallow Boring
高速内冷却浅孔钻加工管板实践与分析
13.
dowelling in the length, of coniferous wood
针叶树木板,经纵钻孔的
14.
They were drilling Boles in a steel plate
他们在钢板上钻孔。
15.
They drilled through a Board
他们在木板上钻孔。
16.
I drilled the board through.
我把木板钻了一个孔。
17.
Effect of Cutting Parameters on Deep Hole Drilling's Quality of High Pressure Heater Tube Plates
切削参数对高压加热器管板深孔钻孔质量的影响
18.
A Few Methods of Raising the Accuracy of the Location of Drilling a Hole for Fitters;
提高钳工实习钻孔位置精度的几种方法