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蝶形螺母 diéxíng luómǔ
agric. thumbnut
cyc.sport fly nut
dril. castle nut
el. castellated nut
hydroel.st. winding tools and devices
met. butterfly nut; thumb nut; wing nut; winged nut
nautic., tech. ear nut
tech. castellated screw nut
蝶形〔翼形〕螺母
gen. thumbnut; thumb-nut
蝶形元宝螺母
auto. wing nut