The registered address of the city of qingzhou and mechanical equipment ltd. Is located in the village of squawk, tanjo town, qingzhou city, with the registration authority being the market supervision authority of qingzhou city, represented by the legal person zhang zheng zheng zheng, operating in the areas of rock washing, sand washing equipment, sand separation equipment, sand sifting equipment, sifting equipment, spiral washing equipment, environmental protection equipment, car washing equipment, mixing station equipment, slurry filtering equipment, sand extraction equipment, sand extraction equipment, sand extraction equipment, production, sale, import and export of goods (project authorized by law and subject to the approval of the relevant authorities)。