The registration address of the state of hebei is located in the north-eastern corner of the town of nangyu, yugyu, yuzhou district of the city of quan, with the registration authority being the quizhou market supervision authority, with legal representatives, and covers the sale of explosive appliances and instruments, accessories, production and sale; the sale of glass and steel products, central air conditioning and accessories, transmission equipment and accessories, cables and bridges, mechanical and electrical equipment; the import of machinery, spare parts, raw materials for the export of the enterprise's own products and for the import of the enterprise's own equipment, spare parts, except for goods which the state limits the operation of the company or which are prohibited from import or export