Mechanical equipment research and development; Machinery and equipment sales; Machinery and equipment rental; Electrical machinery and equipment sales; Gas compression machinery manufacturing; Manufacturing of special equipment for electrical machinery;Agricultural machinery manufacturing; Agricultural machinery rental; Agricultural machinery sales; Agricultural machinery services;Forestry Machinery Services; Fishery machinery manufacturing; Fishing machinery services; Fishing machinery sales; Animal Husbandry Machinery Manufacturing; Agricultural, forestry, animal husbandry and fishery machinery parts manufacturing; Sales of agricultural, forestry, animal husbandry and fishery machinery parts; Manufacturing of specialized machinery for agriculture, forestry, animal husbandry, sideline production and fishery; Installation of specialized machinery for agriculture, forestry, animal husbandry, sideline production and fishery、 repair; Agriculture、 Forest、 Mu、 vice、 Sales of specialized fishing machinery; Mechanical parts、 Parts Sales; Mechanical parts、 Parts processing; Jewelry Wholesale; Jewelry Manufacturing; Jewelry Retail; Metal daily necessities manufacturing; Metal product sales; Motor Manufacturing; Manufacturing of micro motors and components; Sales of micro motors and components; Home appliance sales; Home audio-visual equipment sales; Bicycle and spare parts retail; Bicycle and spare parts wholesale; Sales of distribution switch control equipment; electric wire、 Cable Operations; Auto parts and accessories manufacturing; Auto parts wholesale; Auto parts retail; Hardware product research and development; Hardware product retail; Hardware product manufacturing; Plastic product manufacturing; Plastic product sales; Electronic component manufacturing; Electronic components retail; Electronic components wholesale; Sales of power electronic components; Electronics sales; mold manufacturing; Technical Services、 Technology Development、 Technical Consulting、 Technical Exchange、 Technology Transfer、 Technology Promotion; Generator and generator set manufacturing; Sales of generators and generator sets; electronic、 Mechanical equipment maintenance( Excluding special equipment); Technology import and export; Import and export of goods