Refrigeration Unit, Pressure Vessel, Air Cooler manufacturer / supplier in China, offering Bit-Zer Refrigeration Compressor CO2/Ammonia/Screw Cascade Condensing Refrigeration Compressor for Aquatic Products Processing/Cold Storage Room, CO2, Ammonia Intermediate Back Pressure Compressor Unit for Cold Storage with Variable Frequency, PU Foam Insulated SIP Polyurethane Sandwich Panels for Walls and Roofs and so on.