radius of operation

The successful application of DWD in the short-radius deep sidetracking of horizontal wells in Taha region provides an effective way for reducing the cost of short radius horizontal well drilling, improving the operation efficiency, eliminating the operational risks, it is worthy to be introduced in oilfields.

DWD在塔河地区深侧钻短半径水平井中的成功应用，为短半径水平井降低施工成本、提高施工效率、回避施工风险找到了一条有效的途径，具有一定的推广应用价值。

Advance a king of arithmetic on C-cutter radius compensation basing on linear interpolation. To turn trigonometric function and evolution operation to that of addition and subtraction, simple and practical, there for solving the problem how to comprehensively realize C-cutter radius compensation in economical CNC system.

提出一种基于直线插补思想的C刀补算法，将三角函数及开方运算转换为加、减运算，算法简单实用，解决了C刀补在单片机开发的经济型CNC系统中的实现问题。

By means of SiO 2 mask and SF 6 etching corrosive, the cantilever beam with tip is shaped by reactive ion etching once through operation. The probe has been shaped by wet corrosive and the tip radius is about 50 nm.

以SiO2为掩模，SF6刻蚀硅，用RIE与各向同性湿法化学腐蚀相结合使悬臂梁探针一次成形和用湿法腐蚀锐化探针，针尖半径约50nm。

X-ray examinations of the bones were carried out at 2, 4, 6, 8~ 10 post operation weeks ( POWs). Meanwhile 4-5 rabbits were sacrificed for the harvesting of the radius on both sides for histological examination.

分别于术后2、4、6、8～10、12周摄X线平片，同时分别处死4～5只兔并取两侧桡骨行组织学切片检查。