The Si-Mn steel track plate and pin usually exist the early abrasion one of the main reasons is the burr defect of pin hole .

硅锰钢 履带板销 孔存在脉纹铸造缺陷是造成 履带板与 履带销出现早期磨损现象的根本原因之一。

By moving the CCD camera according to the track of the two-dimensional image measurement system an image of the drone with a round hole is collected and the location of the center of the hole in the image is calculated .

标定时，使CCD摄像机沿着二维图像测量系统的 导轨移动，采集加工有1个 圆孔的靶标件的图像，计算圆心在图像中的位置。

Well body track curve can be drawn out through surveying the depth in the hole .

通过对 井筒不同深度的测量，即可得出井身 轨迹曲线。

Banked curve up to 45 degrees cycle track w_9 INFLUENCE OF HOLE POSITION ON BENDING RIGIDITY OF UD-LAMINATE

单车 径外侧向上倾斜45度 穿孔位置对单向层板弯曲刚度的影响

Automatic Directional Drilling aims to restrain the drilling path to the desirable track by imposing forces for well straightening through control system immediately when detecting the deviation of drilling hole through MWD ( measurement while drilling ) .

自动控向钻井技术是在钻进时随钻测量 钻孔的偏斜，发现 孔斜后随即通过控制系统给出纠斜力，使得钻孔 轨迹沿着设计的方向前进；

Fission track ages of apatite from a deep drill-hole in Linqing Basin decrease from about 80 Ma to 1 Ma near the bottom of the hole .

取自华北临清拗陷深钻井中的磷灰石，其裂变 径迹年龄从 井浅部到底部递减，年龄由80Ma减到1Ma。