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​B? K? A? W?
what exactly is it?

Corrugated Board
It is also called a corrugated paper or paper-skin corrugated pit-shaped paper core with flat paperboard adhered to one or both sides of the sandwich paperboard.
There are single-sided, single-layer (double-sided), double-layer and three-layer corrugated cardboard.

In Guangdong, K, A, B represent cow cardboard, imitation cow cardboard




C represents 127 grams of liner paper

T stands for 160~180g liner paper

W paper represents white paper, cow background white and white noodle cow card 

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