Great Win Testing Machine CO. Ltd was set up in 1999, it has been over twenty years' history in the field of professional experience for lab testing instrument such as Footwear, Leather, Textile, Toy,
40L/Min~100L/Min Respiratory Resistance Mask Tester GB 2626-2006 / GB 2890-2009 Main application: It is used to determine the resistance to inhalation ...