Land-based decompression chamber means the decompression chambers installed in the buildings on land and the maximum working pressure is 1.0 MPa, which is mainly used for simulating the diving depth within 100 meters environments to carry out pressurized training and for the treatments of decompression sickness. As the domestic navy decompression equipment suppliers, Hongyuan company has manufactured dozens of land-based decompression chambers with advantages of advanced performances and reliable quality for navy large fleet bases, research institutes and medical organizations for years, developing and applying innovative air circulation system at chambers, recovery devices of CO2, computer automation control systems and other core technologies which have obtain patents. With the excellent quality and considerable protection services, our products have been widely recognized and receiving high praises, providing navy forces and research institutes with powerful equipment guarantees.