library cart,book cart ,V cart 1.library book cart,V cart 2.cold-rolled steel 3.factory ... can not knock down library cart,book cart ,V cart 1).high quality cold-rolled steel plate, undergone phosphorizationa ... powder coated,no smell,environmental protection;3)."V" shaped,with 4 wheels at underneath4).thickness 0 ... .4--1.0mm available;5).can not knock down, pack ...