1. Twist drill is the tool often used in machine process.

2. Most drilling in metal is done with a twist drill.

3. The mathematical model of the hyperboloid twist drill was introduced.

4. The twist drill may be divided into three principal parts: shank, body and point.

5. How to machine twist drill high efficiently and high precisely is a problem to discuss.

6. A twist drill is designed to drill a hole which has a particular size.

7. This paper mostly studies the spiral configuration of the country standard twist drill concretely.

8. As a base of post processing(sentencedict.com/twist drill.html), the grinding of Taper Shank Twist Drill effects the qualified rate of drill.

9. This paper illustrates the principle of the inner cone grinding twist drill and the process of grinding experiments on the tool grinder.

10. Based on the mathematical models of the flute surface and the flank of the twist drill with quadratic flank faces, its relevant planes and lines were mapped on a projection plane.

11. The manufacturer of the handpiece may recommend proper speeds to avoid failures such as breakage of the twist drill.