drilling collar

英 美
  • 钻铤
  • collar n.衣领;项圈;[机]轴环vt.抓住;为...戴上项圈;为...上领子
  • drilling n.演练;钻孔
    1. We need a short drill collar to put here.
      这里要接一根短钻铤。
    2. They have not measured the length of spiral drill collars and monel collars yet.
      他们还没测量螺旋钻铤和无磁钻铤的长度。