threader
/ˈθredə(r)/noun
1
- a device for passing a thread through the needle and guides of a sewing machine穿线器; 穿针器。
1.1
- a factory worker who attaches spools of yarn to a loom装纱锭工。
2
- a device for cutting a spiral ridge on the outside of a screw or the inside of a hole螺丝车床; 螺纹铣床; 螺丝磨床。