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。
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。
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。
应用推荐