-The overall structure is an irregular L-shaped groove, with the surrounding edges folded upwards to form a groove for accommodating space; There is an oval shaped waist hole on the board for installation and adjustment.

-A conical variable diameter cylinder with different diameters is welded downwards in the middle of the shell, which can be used as an air duct, guide or avoidance structure.

-Welding seams can be seen at the corners, and the contour has been laser cut, with irregular shapes and multiple notches and folds, used to adapt to the internal structure of the equipment.