Clean room, clean window manufacturer / supplier in China, offering Stainless Steel Passing Box Used in Cleanrooms/Labs/Cosmetics/Electronics/Food Processing with UV Lamps/HEPA, New Dynamic with Filter Efficient Passing Boxes for Laboratory/Plasma/Cosmetic/Electronic/Surgery, Sealing, Noise Insulation, Anti-Collision/Deform, Various Styles, Customized Steel Door and so on.