一种带定位器的骨科导钻，用来引导骨钻钻孔方向。
A kind of orthopedics guide drill with a positioning device is used to guide the direction of the bone drill in drilling.
目前，通用的设计方法是不考虑岩体的各向异性而采用固定的钻孔方向。
Recently, a common method is fixing direction of drill hole, not considering anisotropy of rock body.
文章着重探讨孔斜成因及其不良影响，介绍了孔斜的预防和处理措施，对保证钻孔方向的重要性提出了一些建议。
The article mainly discusses the cause of ramp-hole and its blights, introduces the prevention and treatment measures, and brings forward some Suggestions to guarantee the drilling direction.
为保证工程质量和提高经济效益，应寻找质量效益系数最佳的方向作为钻孔矢量的方向。
The best direction of quality and efficacy coefficients has to be found as the direction of drill hole vector in order to ensuring engineering quality and raising economic efficacy.
采用钻孔_电测法对LY 12铝合金垂直于焊缝方向的焊接残余应力及其分布规律、产生的原因进行了分析，探讨了残余应力的消除措施。
In this paper, welding residual stress vertical to welding seam in LY12 armour aluminum alloy was measured by hole-drilling and electrical-measurement method.
动力头及孔口板调转方向，可直接钻凿仰孔，大大增加钻孔倾角范围。
It can increase the hole inclination Angle range and drill elevation Angle holes, while setting the top drive power head and hole top plate toward the opposite direction.
所以，在以科学研究为目的的钻井工程中，最好能够结合钻孔法和岩芯法得到三维地应力的大小和方向。
In the case of scientific deep-drilling Wells, therefore, it is desirable to combine borehole methods with core-based methods to obtain a complete three-dimensional in-situ stress.
根据煤层割理渗透率的各向异性，采用垂直面割理和平行面割理两个方向布置钻孔抽放煤层气。
This experiment bases on different permeability in different directions of coal seam cleats. To arrange methane drainage direction the directions vertical and parallel to face cleat are adopted.
根据煤层割理渗透率的各向异性，采用垂直面割理和平行面割理两个方向布置钻孔抽放煤层气。
This experiment bases on different permeability in different directions of coal seam cleats. To arrange methane drainage direction the directions vertical and parallel to face cleat are adopted.
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