The filter media must be made of a synthetic, non-water, soluble material, such as polypropylene or acrylic fiber.
过滤材质必须用合成的不溶于水的材料制成，例如聚丙烯或丙烯酸烯纤维。
Aluminum or galvanized box frame, non-woven synthetic filter media;
铝框或镀锌框，合成纤维无纺布滤料；
Aluminum or galvanized box frame, non-woven synthetic filter media;
铝框或镀锌框，合成纤维无纺布滤料；
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