One is that the steel plate folds should be straight. Usually, large enterprises use fully automatic CNC laser machine to fold the edges. The folds look straight to the naked eye, there are few warping and unevenness, and the touch is very smooth and smooth.
The second is the openings, especially the screw openings at the cabinet interface, which must be 100% accurate. If the screw openings at the cabinet connection are not accurate, it will affect the final assembly effect.
The third is the welding point. Generally, the cabinet is completely disassembled and assembled, no welding is required, and there is no solder joint. Another point is the junction of the countertop, the wash basin, and the edge of the panel. For products with high craftsmanship, the junction is usually flat and smooth, and no welding marks are visible to the naked eye.