1. The outer layer of the aluminum box has cracked edges due to poor quality of the aluminum material. If it is a small number, it should be returned, replaced, and reprocessed. If it is a large phenomenon, all the outer plates of the aluminum box should be returned, otherwise other outer plates of the aluminum box will also crack after a period of time, and will be blown away by the typhoon.
2. Material issues. The material of the outer plate of the aluminum box is not qualified.
3. The thickness of the outer plate of the aluminum box cannot meet the requirements
4. Aluminum veneer can be welded.
