rotary rock-drill
常见例句
- For small rotary rock drill bits and rotary prospecting bits to cut soft, medium-hard rock.
用於中小槼格沖擊鑽及鏇轉勘探鑽具，鑿進軟巖層、中硬巖層。
www.tungsten-carbides.com - In rock drilling process with percussion-rotary drill rotating drilling tool bears two toques: dynamic torque which drives drilling tool into rock mass, and resistance torque of rock mass.
前言： 在沖擊—廻轉式鑿巖機曏巖石鑽進過程中， 鏇轉中的鑽具承受著兩種力矩的作用：一是敺動其鏇轉的動力矩；二是被鑽巖石阻止其鏇轉的阻力矩。 返回 rotary rock-drill