介绍了单阶梯尖环齿钻头的结构特点及碎岩特点。
This paper introduces the 'structure characteristics and rock fragment characteristics of single step drill head with point pick.
介绍了单阶梯尖环齿钻头的结构特点及碎岩特点。
This paper introduces the 'structure characteristics and rock fragment characteristics of single step drill head with point pick.
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