... water, gas dual-use, simple operation, can be standing or hanging, is more practical; Why do we need an air purifier ... make indoor air unhealthy to breathe, especially for babies, children, and the elderly is long and growing. The reasons are yet to ... the functions of sterilization, cleaning, decoloring, deodorization and mold proofing for clothes, textiles and other daily articles.f. Get rid of the ...