rotary rock-drill
常见例句
- For small rotary rock drill bits and rotary prospecting bits to cut soft, medium-hard rock.
用于中小规格冲击钻及旋转勘探钻具，凿进软岩层、中硬岩层。
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： 在冲击—回转式凿岩机向岩石钻进过程中， 旋转中的钻具承受着两种力矩的作用：一是驱动其旋转的动力矩；二是被钻岩石阻止其旋转的阻力矩。 返回 rotary rock-drill