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A multi-layer mesh belt conveyor is a combination of single-layer mesh belt conveyors; its structure typically consists of 3 or 5 layers. This type of conveying structure is suitable for the continuous turning movement of materials. Another advantage of multi-layer belt conveyors is that the length of the conveying equipment is reduced, without a corresponding decrease in the conveying distance; this shows that multi-layer belt conveyors are most suitable for use in dryers and washers. In a multi-layer belt conveyor system, the material is transported by starting from the first layer at the top, then moving downward layer by layer, and being delivered out through the lowest layer. During this process, the material can be dried or cleaned by applying heat or using nozzles. The ability of materials to be turned over on multi-layer belt conveyor systems is the most desirable feature in drying or cleaning processes, as this turning allows the materials to come into contact with the heat or water source over a larger area, thereby achieving a more thorough drying and cleaning effect. There are now only two methods for flipping finished materials on belt conveyors: one is to use a staggered-layer belt conveyor, and the other is to use a multi-layer belt conveyor; both of these methods enable the materials to flip freely. The first type of structure is suitable for materials with a large inertial volume, while the second type of conveyor belt equipment is suitable for materials with a small inertial volume; in either case, it is possible to achieve efficient drying or cleaning. The requirements for belt conveyors are increasing, ranging from transportation in natural environments to drying and cleaning processes; the staggered-type belt conveyor meets these complex transportation challenges to a large extent. The stepped belt conveyor has received widespread acclaim since its introduction; this design represents a technological breakthrough as well, enabling it to perform tasks that would require belts twice or even several times longer than those used in conventional conveyors. It is particularly suitable for use in metal part drying and cleaning production lines. It turns out that in the processes of packaging transportation, drying transportation, and cleaning transportation, a single-layer linear structure was used throughout. Over the years, improvements have been made, and multi-layer belt conveyor systems have gradually come to be adopted in various industries. This multi-layered planning structure is most suitable for enabling the turning of materials during transportation, and this advantage is particularly evident in drying processes. The introduction of this structural design has also taken belt conveyors to a new level of application. For tasks such as the surface treatment of metal parts and the drying of products, this type of multi-layer mesh belt conveyor is the most commonly used.