KUKA库卡机器人手臂AT3系列同步带AT3GEN-3齿形长度齿数AT315050AT320167AT3201FN6867AT325284AT326789AT327090AT3300100AT3351117AT3399133AT3417139AT3450150AT3486FN18162AT3501167AT3549183AT3600200AT3639213AT3648216AT3648FN24216AT3714238AT3816272AT3816AF272AT3900300AT31011337Preferredbeltwidthinmm:6,10,16,25,32)