Plastic shelves different
For exmple, we have one of size for plastic tray 48*35cm. But we have 3 kinds of design for the trays, we have 3 moulds.
2. the bottom of diamond
3. tray with holes
What's the difference between these three designs?
The biggest difference is load bearing.
The bottom of diamond load bearing more better than the others.
The bottom of cross load bearing more better than the tray with holes.