The registration address of dong jiu-il vacuum electric equipment ltd. Is located on the 3rd floor of building a2 of road no. 179 a of the tung-hung pil-tub community in east chang city. The registration authority is the market supervision authority of dong jian city, represented by a legal person, liu yu yi, and operates in the areas of research and development, production, sale and online sale of vacuum electrical equipment and spare parts; sale and online sale of: oil equipment, refuelling machines and accessories, electronic materials, instruments, lubricant oil (without dangerous chemicals); maintenance: vacuum electrical equipment, oil equipment; technical consultancy services for mechanical and electrical equipment; and import and export of goods and technology。