How to read the drill bit

How to read the drill is introduced as follows:

Zuà n Tó u: 1。 Drilling tools, drilling machines and drilling machines. Will cause holes in the workpiece or rock. Something similar: drill a head and find a seam? Drilling rig? Training camp? Drill a hole? Smart? Drilling? Drill? Yellow diamonds.

Make the following sentences:

1, learning is like a drill, digging a deep well of knowledge. Q is like a key, which opens the door to mystery.

Lao Wang feels as if he has a pair of eyes, turning round and round, like a drill, trying to drill into his heart.

3. People who are snobbish and eager to find cracks will certainly not be despised.

4. When the cold drill bit reached into the woman's mouth to repair the decayed tooth, she reached out and grabbed the middle part of the doctor's crotch, with tears in her eyes and said, "Doctor, neither of us will hurt, will we?" After I saw this joke, it caused a series of confusion and wrong association ability.

5. A lot of drilling time is wasted on replacing the drill bit, which makes the cost increase exponentially with the depth of drilling.

6. The movable fixture used to sharpen the drill bit is a testing tool used to sharpen the drill bit.

7. Rotary percussion drilling tool is one of the main means to solve the problems of low ROP and short bit life in hard and brittle formations.

8, screwdriver head, Allen wrench, pneumatic screwdriver sleeve, drill, chisel, connecting rod …

9. Based on the uniform distribution of diamond in impregnated drill bit, the cutting depth and stress of diamond at different radial positions on the lip surface are theoretically deduced.

10, the balloon, the drill and the laser head are all mounted on a catheter, and a small puncture hole in the arm or groin passes through the artery to reach the blocked part.

1 1, at the beginning of drilling work, the eccentric reaming sleeve is screwed out along the center guide bit, and reaming is started at the same time, so as to ensure that the casing and drilling system advance synchronously.

12, the structure adopts a three-wing four-tooth bit body and an arc groove-shaped powder discharge groove, which is suitable for three tooth shapes of hard, medium hard and soft rock.

13, the bottom hole mode is a group of pits formed by the teeth of the drill bit on the bottom hole rock during drilling.

14, measured while drilling, the reference point is the bit depth.

15, application: it is suitable for embedded bits of heavy rock drills, such as deep-hole drilling and drill bits of rock drills.