环卫工人 SANITATION WORKER ; Landscaping and Groundskeeping Worker ; dustman ; Garbage Collector

环卫工程师 sanitation engineer

请尊重环卫工人 Urban and Rural Development

环境卫生工程 Environmental Sanitation Engineering ; Environmental Health Engineering ; [医] environmental hygiene engineering ; Environmental / Environmental Health

环境卫生工程学士 Environmental and Sanitary Engineering

对地静止环境工作卫星 GOES

环境卫生工作人员 Environmental Health Officer

环境卫生工程师 sanitation engineer