Erra Environmental and Heating Technology Inc., Retrosers Heating Technology Inc., and Cevse Environmental Technology Energy and Heating Co. Ltd. operate as group companies.

Our companies offer machining services, all types of stainless steel fabrication, industrial facility automation installations and software, gunpowder production process installations, primarily for cylindrical gunpowder and spherical gunpowder, various sizes of TNT filling systems, TNT nitrator manufacturing, rocket fuel rolling facilities, and turnkey project design and installation.