The registration address of hangzhou community environmental science and technology ltd. Is located in 2 101 chambers of the zhejiang province upper city street pedestrian industrial park, with the registration authority being the hangzhou city market supervision authority, representing zhang jung jun, and covering general projects: sale of pumps and vacuum equipment; sale of specialized equipment, critical systems and components for rail transport; sale of technical services, technology development, technical advice, technology exchange, technology promotion; development of mechanical equipment; development of artificial intelligence base software development; software development; valve and rotor development; development of gold products; development of sanitary and cleaning equipment; industrial design services; water pollution prevention and treatment services; sale of gas compression machinery; sale of household garbage disposal equipment; sale of machinery spare parts; sale of...