... 双丁槽焊 double-J groove weld 双螺帽 double nut 双通净油系统 double pass purifying system ...
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screw and double nut 螺丝和双螺母
double nut bolt 双头带帽螺栓
Double-nut ball screw 双螺母滚珠丝杆
worm-and-double-nut steering gear 螺杆螺母式转向器
connection of double-nut 双螺母联接
Giant Double Chocolate Nut Biscuits 双层巧克力果仁饼干 ; 巧克力︰双层巧克力果仁饼干
double head nut 双头螺栓
double threaded nut 双螺纹螺母
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