1.
guide twist drill
有导径的深孔麻花钻
2.
A twist drill is designed to drill a hole which has a particular size.
麻花钻用来钻削具有一定尺寸的孔。
3.
Most drilling in metal is done with a twist drill.
大多数金属钻孔用的是麻花钻头。
4.
Study on drill bit for large diameter core drilling of deep hole in hard rock
硬岩深孔大口径取芯钻进的钻头研究
5.
counterbore with guide
有导柱的平底扩充孔钻
6.
A Brief Explanation of Air Actuated DTH Hammer Drilling Efficiency
空气潜孔锤钻进是提高钻进效率的有效途径
7.
Application of Advanced PHP Slurry to the Construction of Long and Large Diameter Bored Piles in Deepwater and Complex Land
高级PHP泥浆在深水大直径钻孔桩施工中的应用
8.
The Reasonable Distribution and Design of Guidance Blocks for Deep-hole Drills by Internal Chip Removal
内排屑深孔钻导向块的合理分布及设计
9.
Parallel shank twist drills--Part 3: The types and dimesnions for parallel shank jobber series twist drills
直柄麻花钻第3部分:直柄麻花钻的型式和尺寸
10.
Study on Gas Storage Law and Effective Extracting Radius of Borehole in Deep Coal Seam
深部煤层瓦斯赋存规律及钻孔抽采有效半径研究
11.
high efficiency drilling system for small and deep hole
高效小直径深孔钻削系统
12.
The Construction Techniques for the Deep-water and Large Aperture Drilled Piles of Hutiaomen Bridge
虎跳门特大桥深水大孔径钻孔桩施工工艺
13.
When drilling deep holes, the feed movement should be released from time to time.
在钻深孔的时候，有时必须放松进给运动。
14.
Elementary Analysis on Engineering Practice of Large-diameter Deep Long Bored Pile in Soft and Hard Terrane
浅析大直径深长钻孔桩在软、硬质岩层的工程实践
15.
Research on the Cutting Performance of the Horniness Alloy Drill with Larger Length to Dirmeter
大长径比整体硬质合金深孔钻头的切削性能分析
16.
Since the inception of this project in1998, three pre-pilot holes have been completed and the main hole has reached a depth of over3500 m.
从98年开始，已经完成3个预先导孔的钻探工作，主孔钻进深度已经超过3500米。
17.
Drilling 50 yards deep,
钻孔至50码深处，
18.
The Optimal Design About the Trajectory of Non dig Guided Boring
非开挖导向钻进钻孔轨迹的优化设计