steam-operated drill

steam-motivated diamond drill

蒸汽驱动的金刚石钻

a power shovel that is driven by steam.

用蒸汽驱动的动力铲。

diamond content

钻头上金刚石的克拉数

Study on the Automatic Laser Welding System of Diamond Core Drill Bit;

自动化金刚石钻头激光焊接系统的研究

Experimental study of diamond impregnated drilling bit enhanced with CVD diamond pins

CVD金刚石条强化孕镶金刚石钻头的试验研究

A form of opaque or dark-colored diamond used for drills.

墨金刚石一种不透明的或深色的钻石，用作钻（头）

Chip Removal Regularity and Bit Face Shape Selection in Impregnated Diamond Bit Drilling

孕镶金刚石钻头的排屑规律与钻头唇状选择

STUDY ON THE NEW METHOD OF DRILLING CONTROL OF IMPREGNATED DIAMOND BIT

孕镶金刚石钻头钻进控制新方法的研究

A great collector of gems and diamonds---you ought to see his fingers ...."

他收藏的宝石金刚钻！ 只看他两只手——”

diamond pattern

钻头金刚石颗粒的排列型式

pack-sack diamond drill

可背运的轻便金刚石钻机

machine set bit

机镶细粒金刚石钻头

screw-feed diamond rig

螺旋给料式金刚石钻机

diamod-enhanced hammer bit

金刚石镶齿震击钻头

diamond-particle bit

潜铸型细粒金刚石钻头

insert polycrystalline diamond bit

聚晶金刚石镶齿钻头

insert natural diamond bit

天然金刚石镶齿钻头

polycrystalline diamond compact bit

聚晶金刚石复合片钻头