Drywall screws, Phillips bugle head, CoarseThread, Sharp point, black phosphated.
干墙螺丝,十字喇叭头,粗纹,尖头,磷化黑色。
2
A type of screw and nut with coarse pitch was applied to realize thread core demoulding automatically.
采用螺距粗的螺丝和螺母实现螺纹型芯自动脱模。
3
Through analyzing of a bottle cover structure with inner thread, a type of screw and nut with coarse pitch was applied to realize thread core demoulding automatically.