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螺尖丝锥在普通丝锥切人部排屑槽上,沿切削刃侧铣螺旋槽,使之易于排屑 luójiān sīzhuī
construct. gun tap
螺尖丝锥 luójiān sīzhuī
tech. spiral pointed tap
螺 尖 丝锥
: 1 phrase in 1 subject
Technology1