... 钻取岩心 钻取岩心 entkernen 钻取岩心样品 rock core drill 钻粒岩心钻机 shot core drill ...
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Rock Core Drill(岩心钻), 此释义来源于网络辞典。
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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。
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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。
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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