1.
Ruby is less valuable than diamond .
红宝石不如金刚石贵重。
2.
Diamonds and rubies are gems.
金刚石和红宝石都是宝石。
3.
machine set bit
机镶细粒金刚石钻头
4.
screw-feed diamond rig
螺旋给料式金刚石钻机
5.
diamod-enhanced hammer bit
金刚石镶齿震击钻头
6.
diamond-particle bit
潜铸型细粒金刚石钻头
7.
insert polycrystalline diamond bit
聚晶金刚石镶齿钻头
8.
steam-motivated diamond drill
蒸汽驱动的金刚石钻
9.
mining for gold, diamonds, etc
开采黄金、 金刚石等.
10.
Diamond Shamrock Inc.
金刚石沙姆罗克公司
11.
specially shaped electroplated diamond products
异型电镀金刚石制品
12.
diamond nuclear radiation detector
金刚石核辐射探测器
13.
insert natural diamond bit
天然金刚石镶齿钻头
14.
diamond content
钻头上金刚石的克拉数
15.
insert reaming shell
镶有金刚石条扩眼器
16.
diamond die polishing machine
金刚石拉丝模抛光机
17.
diamond cone superficial hardness tester
金刚石锥表面硬度计
18.
diamond-coated cutting wheel
带金刚石层面的切割轮