rock core drill

常见例句

双语例句

• A drill bit used for obtaining core samples in concrete or rock formations.
  钻头被用来在水泥或岩层获取岩芯样品。
• This allows the bit to drill around a central cylinder of rock, which is taken in through the bit and into the core barrel.
  这样允许钻头围绕岩石的中心圆柱体钻进，并通过钻头进入取芯桶。
  www.infopetro.com.cn

权威例句

• In its Fruta del Norte site a drill core showed a rich 32 troy ounces of gold per ton of rock.
  FORBES: Latin Mining Via Toronto
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