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钻头钻

钻头钻

钻头钻

钻头钻

1

The king of the oilfield is the driller. he is a very skilled man . Sometimes he sends is drill more than a mile into the earth.

油田的主角是钻井工。他们是熟练技术工人。有时他得把钻头钻入地下一英里深。

2

The drill bit breaks through the wall and he smiles .

当钻头钻通了墙后，他高兴地笑了。

3

Sometimes he sends his drill more than a mile into the earth .

有时他得把钻头钻入地下一英里深。

4

Investigations on the Transverse Micro-Drill Deflection of the Drill Point at the Entrance in Low Frequency Vibration Drilling

低频振动钻削时微小钻头钻入横向偏移的研究

6

The Research on Measurement of Micro-drill Core Dimensions

微型钻头钻芯尺寸测量的研究

7

Test research of drilling force for XYZ series rock bit

XYZ 系列岩石钻头钻削力试验研究

8

Research on Cutting Performances of Three Kinds of Coated Drills during Drilling Stainless Steel

三种涂层钻头钻削不锈钢的切削性能研究

9

use of stabilizers of bit and string

钻头钻拄扶正器的使用

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