牛头梗小城堡
铆钉 [词典] [设计] rivet; clinch; clinch bolt; [例句]将铆钉和铆钉部件一起插入。Insert rivets and rivet components together.
小盆友2鸣儿
screw =boltwall insert bolt胀管螺钉butterfly nut元宝螺母stud bolt双头螺杆countersunk bolt 平头螺钉round head bolt 圆头螺钉cap nut 奶头螺母hex。socket head cap bolt内六方螺钉
