spoon bit

a steel drill with a star-shaped point that is used for making holes in stones or masonry; it is operated by hitting the end with a hammer while rotating it between blows.

用于石器或石匠术钻孔的有星形钻头的钢钻；通过锤子的敲击来工作，两次敲击之间旋转。

spider bow [for well drilling machines]

星形斗[钻井机用]

brace countersink

钝角菊花形尖头板钻

diagonal cut rock drill plus bits

对角十字形岩石钻头

cross-bladed chisel bit

十字刮刀楔形齿钻头

shaped insert bit

非球形硬合金齿钻头

shoulder dressing tool

钻杆接头端面整形工具

cone type roller bearing rock bit

滚柱轴承锥形牙轮钻头

A needle-shaped drill for boring holes in rock or masonry.

钻头，钻石器，钻孔器用于在岩石或砖石上钻孔的针形钻

the round part of the bit by which it is held in the drill.

钻头上的控制钻孔机的圆形部分。

Improvement of Drill Point Geometry for Drilling High Manganese Steel ZGMn13;

钻削高锰钢ZGMn13钻头刃形改进研究

unit-type drill head

组合钻床钻头, 标准钻头

an annular drilling bit to allow core samples to be taken.

用来获取采样的一种环形钻头。

Finite element analysis of the screw structure of the drill-stem junction

钻杆接头螺纹结构形式的有限元分析

Diamond;Triangle Down;Triangle Up;Arrow Down;Arrow Up;Star;Circle

菱形;倒三角形;正三角形;向下箭头;向上箭头;星形;圆形

Diamond;Triangle Down;Triangle Up;Arrow Down;Arrow Up;Star;Circle;None

菱形;倒三角形;正三角形;向下箭头;向上箭头;星形;圆形;无

drill(ing) head

钻头; 主轴头; 钻床床头箱; 钻削动力头;钻头头部, 钎头

It cuts a clean cylinder of rock,

这种钻头能切割一段光滑的圆柱形岩石，