... Activated purification carbon carving crafts series product have developed hole structure, the major is alveolus, Product structure: Active purification carbon ... be branched by the filtration hole. Active carbon series product can adsorb various of venomous gas ... (formaldehyde, benzene, dimethylbenzene, ammonia, chlorine, carbon monoxide, sulfur dioxide, smog, peculiar smelling, etc) from ...