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- Research on and Development in the Geo-physical Blast Hole Drill and Its Accessory Tools in Mountainous and Hilly Area 山地丘陵地区物探爆破孔钻机及配套机具的研究与开发
- The automatic hoist device of cable of blast hole drills 牙轮钻机电缆自动卷扬装置
- blast hole drill 凿岩机
- Testing of the Air Reverse Circulation Drilling Process in Geo-physical Blast hole Drilling 空气反循环钻进工艺在物探爆破孔施工中的试验应用研究
- underground blast hole drilling 井下炮眼钻凿
- blast hole drilling rig 炮孔钻机
- WISDOM DEEP HOLE DRILLING MACHINE CO., LTD. 慧能深孔机械有限公司。
- Dual action: hammer drilling and hole drilling. 二模式动作:锤钻及单钻孔。
- DEEP HOLE DRILLING TECHNOLOGY LTD. 北京哈镘深孔技术有限公司。
- The form and devel-opment of the blast hole cracking is t he main reason which leads to the effe ctive crush. 不同炮孔周围裂纹的适量产生与发展,是引起岩石有效破碎的真正原因。
- At the Garson Mine in the Sudbury basin, an instrumented test opening has been mined under a paste backfil1ed blast hole stope. 而在萨德伯里盆地的加森矿，已在采用深孔崩矿的膏体充填体下进行试采。
- Blact hole cxplesion in a confed condition within tunneling is analysized,a stage-by-stage blast hole design theory and the related paraameters are presentes. 对掘进中处于夹制情况下的炮孔爆破进行分析，提出炮眼分阶段设计的原理及有关的参数。
- Now this technique is applied in the slim hole drilling in Daqing Oil Field. 目前，此项技术已在大庆油田小井眼钻井中推广应用。
- In level hole drilling,by the using of numerical valule analysis method,the mathematics model of drill hole depth and dip angle relation under someone stratum is set up. 在水平孔钻进中,利用数值分析方法,建立在某种地层下按某种钻具组合和钻进参数钻进时,孔深和倾角关系的数学模型。
- The study has sho wn that the deeper the blast holes, the longer the initiation delay time. 应用模型对掏槽微差起爆时间进行的优化研究表明,掏槽微差起爆时间与孔深成正比。
- Design of the Vertical Bearings Hole Drill Bed 立式轴承座钻孔组合机床设计
- Blasters in this unit group fill blast holes with explosives and detonate explosives to dislodge coal, ore and rock or to demolish structures. 爆破员用炸药填补爆破洞，然后引爆炸药提炼出煤炭，矿石和岩石或粉碎建筑物。
- precision deep hole drill with inside chip removal 内排屑精密深孔钻
- His strength in a crisis is an ace in the hole. 临危不惧是他的看家本领。
- Discussion concerning peg hole drill eventually 关于钻孔桩终孔的探讨
