国产一区二区三区天堂_亚洲av日韩aⅴ无码电影_韩国禁片在线观看_久久影院看电影的网站推荐_免费一级a婬片看35分钟_天天综合色中文字幕在线视频_青草天堂资源在线_欧美SM凌虐VIDEO潮喷_免费无码又爽又黄的视频网站_亚洲一二区精品在线观看

Double-core gypsum board, so that the decomposition of formaldehyde can be seen! Strong adsorption + decomposition layer: blue colored layer added adsorption factor, can actively adsorb and decompose formaldehyde; decomposition layer: decomposition of formaldehyde additive can decompose formaldehyde into non-toxic and harmless inert carbohydrate, and remain in the board;