What are the materials of shelves introduced by the shelf manufacturer?expandable wire storage rack

　　Firstly, shelves are a rough term that includes a lot of content and can be divided into the following categories in terms of materials:

　　1. Steel frame: This is currently the best-selling variety in the market, with the highest sales volume from warehouses to supermarkets. The reason for this should be the low price of steel raw materials, excellent mechanical properties, and good processing properties (such as weldability).

　　2. Wooden shelves are often used for household storage and display in supermarkets.

　　3. Aluminum frame: Lightweight and aesthetically pleasing, commonly used in supermarkets, with limited load-bearing capacity.

　　4. Alloy frame: An improved version of the aluminum frame has increased its load-bearing capacity, but the cost has also increased.

　　5. Paper rack: Usually a disposable product, often used in supermarkets.

　　6. Plastic shelf: usually small in size, used for displaying and storing commonly used goods.

　　Secondly, the shelves made of these different materials, except for metal shelves, have significant limitations and low market demand. With the development of human technology, perhaps one day, cheaper and easier to use materials can be found to replace metal shelves.

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