未知题型

麻花钻是钻孔最常用的刀具，一般由（）制成，工作部分有两条对称的螺旋槽，是（）和（）的通道。（各项用顿号分隔开）

【参考答案】

高速钢、切屑、冷却液

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麻花钻是钻孔最常用的刀具，一般由（）制成，工作部分有两条对称的螺旋槽，是（ ）和（ ）的通道。（各项用顿号分隔开）

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