rotary rock-drill
常見例句
- For small rotary rock drill bits and rotary prospecting bits to cut soft, medium-hard rock.
用于中小規(guī)格沖擊鉆及旋轉勘探鉆具，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—回轉式鑿巖機向巖石鉆進過程中， 旋轉中的鉆具承受著兩種力矩的作用：一是驅動其旋轉的動力矩；二是被鉆巖石阻止其旋轉的阻力矩。 返回 rotary rock-drill