First, the flat type: refers to the goods displayed on the surface of the pile are tiled.
Second, the trapezoid: refers to the big and small under the pile.
Third, the special shape: the general stack head is square, but according to the characteristics of the goods and the actual needs, you can design different head shape, such as dragon boat-shaped dumplings, cylindrical cola pile head, high and low staggered interesting The pile of goods.