Using superior quality insulating cotton and high density of glasswoolboard, it supplied excellent keep-warming effect for the whole collector and reducing the heat loss within maximum limit.
采用优质保温棉，高密度玻璃棉板，为整个集热器提供优秀的保温效果，最大限度的减少热损失。
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Rock woolboard can also be moisture-proof foil surface sticky, black (white) glass fiber mat reinforced fiberglass cloth folder, and moisture and other decorative veneer.