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The wet curtain paper used in the wet curtain system is a special raw pulp, which is bonded by corrugated fiber paper. It has high strength and long service life by adding special chemical components to the papermaking raw materials and special post-process processing. Features. The corrugated fiber structure with a certain angle in the design can provide a large enough surface area for the heat exchange between air and water, and can purify the air entering from the outside, and has a certain natural filter performance.