10 元券减速机蜗轮蜗杆2.7740.55￥5130去看看贴初生活用品馆04发布了S47TDT80K4/0.55/OPGA2.774/M4/Φ30蜗轮蜗杆扭臂减力速机减速机X钢珠钢球滚珠轴承￥262去看看钢珠批发大全发布了gcr15轴承钢珠2.778/2.776/2.774/2.772/2.775/2.77mmG10钢球滚珠
