• The rock stratum drilled by a rotary drill is random distributed and complicated, so it is difficult to define the drilling process.

    牙轮钻机凿的岩层随机分布错综复杂的,因而钻进过程难以定义

    youdao

  • 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: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力矩作用:一是驱动其旋转的力矩;二是被钻岩石阻止旋转的阻力

    youdao

  • 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旋转勘探钻具,凿进岩层、中硬岩层。

    youdao

  • 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旋转勘探钻具,凿进岩层、中硬岩层。

    youdao

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