Self drywall screws, Pan head Phillips, Drill point, zinc.
自攻干墙螺丝,平头十字槽,钻头,镀锌。
Self drywall screws, Phillips bugle head, Fine Thread, Drill point, black phosphated.
自攻干墙螺丝,十字喇叭头,细纹,钻头,磷化黑色。
To design NC grinding machine, the sharpening key technology for new micro-drill point is researched.
为了设计新型微钻头数控刃磨机床,对新型微钻头刃磨的关键技术进行研究。
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