1.
a stone tool from the Neolithic Age.
石器时代的石制工具。
2.
a stone tool from the Paleolithic age.
旧石器时代使用的石制工具。
3.
A stone tool with a convex side.
龟甲形石斧一边凸起的石制工具
4.
Primitive man fashioned tools from/out of stones.
原始人用石头制造工具。
5.
Primitive man fashioned tools from stones
原始人用石头制作工具。
6.
Primitive man made tools from sharp stones and animal Bones.
原始人用尖石块和动物的骨制造工具。
7.
Ancient men made tools of stone.
古代的人制作了石头工具。
8.
Preparation And Properties of Diamond Grinding Tool With Ceramic Bondtng Agent
陶瓷结合剂金刚石磨具制备工艺研究
9.
industrial mould of plaster or compositions based on plaster
工业模具,石膏或以石膏为基料的合成物制
10.
Graphite die for manufacturing diamond tools by hot pressing
金刚石工具制造用热压模石墨材料性能
11.
To break or chip(stone)with sharp blows, as in shaping flint or obsidian into tools.
敲碎用重击来撞碎或凿碎（石头），如把燧石或黑曜岩石制成工具
12.
Primitive man made himself primitive tools from sharp stones and animal bones.
原始人用尖石块和兽骨为自己制作原始的工具。
13.
Stone tools survive very well, while wooden implements do not.
石头工具很容易保存，但是木制品就刚好相反。
14.
Research on Fabrication and Machining Performance of Boron-Doped Diamond Coated Tools;
硼掺杂金刚石薄膜涂层工具的制备和试验研究
15.
Current research situation and development of manufacturing vacuum brazed diamond tools
钎焊金刚石工具制备的研究现状和进展
16.
Fortunately, however, ancient men made tools of stone, especially flint,
然而，幸运的是，远古人用石头制作了工具，特别是用燧石，
17.
A stone implement of the Paleolithic Age.
旧石器旧石器时代的石头工具
18.
"Fortunately, however, ancient men made tools of stone, especially flint, because this is easier to shape than other kinds. "
然而,幸亏古代人制造了石头工具,尤其是燧石,因燧石较其它几种东西更易制作。