名词
中文翻译：打石机
同义词：
['rock drill', 'rock saw例句：1. The knapping machine is used to break up rocks for construction.（凿岩机用于建筑施工中破碎岩石。）2. The engineers used the knapping machine to level the land before building.（工程师们使用凿岩机在建造前平整土地。）']
例句：
-
1. The knapping machine is used to break up rocks for construction.
凿岩机用于建筑施工中破碎岩石。
-
2. The engineers used the knapping machine to level the land before building.
工程师们使用凿岩机在建造前平整土地。
-
3. The knapping machine was the first tool invented to help people move heavy rocks.
凿岩机是发明的第一种帮助人们移动重石头的工具。