rotary percussion drill的意思|示意
旋转冲唤钻机
rotary percussion drill相关短语
1、 rotary-percussion drill jumbo 回转冲击式钻车
2、 rotary-percussion n drill jumbo 回转冲击式钻车
3、 Drill rotary percussion 旋转打击钻
4、 percussion-rotary drill 冲击器
rotary percussion drill相关例句
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。