扩孔钻和锥管丝锥复合刀具
combined taper pipe tap and core drill
镶齿锥管丝锥
inserted blade taper pipe tap
薄壁圆柱管
thin-walled cylindrical tube
超长圆锥管
overlength conical pipe
overlength circular cone pipe
有限长金属圆锥柱
The finite truncated cone-cylinder
圆管柱与方管柱连接
connection between circular and square hollow sections
圆柱(锥)型材
cylindrical and conical shapes
圆柱管螺纹圆板牙
round die for straight pipe threading
圆锥圆弧齿轮
conical circular arc gear