201021) -- HANGZHOU, Oct. 21, 2020 (Xinhua) -- A sanitation worker collects wastes from an automatic cleaning machine in a river in Hangzhou, east China's Zhejiang Province, Oct. 21, 2020. A series

Applied ai hi-res stock photography and images - Page 2 - Alamy

201021) -- HANGZHOU, Oct. 21, 2020 (Xinhua) -- A sanitation worker

Horizontal Automatic Scraper Discharge Centrifuge Gk 1250-N

UNDP-China National Human Development Report 2013 #

China Human Development Report 2013 by United Nations Development

Study on Corrosion Status and Control Strategies in Manufacturing

Defending the city's cleanliness with their lives? A study of road

201021) -- HANGZHOU, Oct. 21, 2020 (Xinhua) -- A sanitation worker

Day 2 Reading - AP ENVIRONMENTAL

Wastes river hi-res stock photography and images - Page 2 - Alamy

Defending the city's cleanliness with their lives? A study of road