Sheet metal is widely used in daily life. If you want a high-quality sheet metal cabinet, you must master some relevant knowledge:

1. Steel plate: the steel plate must be thick. You can feel what is thick and what is thin by tapping it with your fingers.
2. Painting: for a qualified cabinet, all steels need to be painted, and the painting must be average, so as to prevent rust and dust.
3. Architecture layout: Generally speaking, there should be many baffles with heat dissipation holes. Some iron sheets used to fix cables should be wrapped to prevent damage to cables. The side wall fan shall be installed on the rear wall of the cabinet, because most of the heat is generated at the rear of the equipment.
4. Heat dissipation: it is estimated how much heat your equipment produces. Generally speaking, there are two to four fans on the top of the cabinet. The more the better. There are also some screws and nuts used to fix the rack, which should also be sufficient to avoid the trouble of insufficient accessories due to future expansion.

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