R & D, sales, technical services: mechanical and electrical products (laws and administrative regulations prohibit operating and pre-approval of the project except), meters, instruments and spare parts, electronic components, environmental equipment, energy equipment, construction machinery equipment, production, processing , Sales: mechanical accessories; import and export of goods (laws and administrative regulations prohibited except, laws, administrative regulations, restrictions on the project obtain a permit before engaging in business activities after); other not reported to the approval of all legitimate projects. ***