Zhou yong, a legal person, is represented by zhou yong and operates on the basis of the functional parts and accessories of the machine. (c) maintenance of machinery, delivery machinery, waste disposal devices, towing chains, machine-bed attachments, electrical resisters, pallets, sports equipment, teaching equipment, laboratory equipment, gymnasium equipment, stadium support facilities, plumbing and above. (a project subject to legal authorization may only be operated with the approval of the relevant department; a general project may be operated on its own by law)