rotary drill

常见例句

双语例句

• The rock stratum drilled by a rotary drill is random distributed and complicated, so it is difficult to define the drilling process.
  牙轮钻机钻凿的岩层是随机分布、错综复杂的，因而钻进过程难以定义。
• This paper demonstrates developing history of the technique, introduces some new types of percussion-rotary drill and operating technology, and analyzes developing trend.
  简要阐述了冲击旋转钻进技术的发展历程，着重介绍了一些冲击器新品种及其相关的钻进新工艺，分析了该项技术的发展趋势。
• 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。

权威例句

• The number of oil and gas rotary drill operates in the metropolitan region is 14 times the national average.
  FORBES: Thunder In Oklahoma City: Creative Class or Oil and Gas?
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