What is the nickname of sanitation workers?

The nickname of sanitation workers is "street angel". The name is mainly because sanitation workers clean for us in the city, keep the environmental sanitation and beauty of the city, and create a clean and comfortable living environment for us, and are considered as "angels" in the city. This title is also a kind of praise and recognition for the hard work and selfless dedication of sanitation workers. I hope people can respect and care about their work, and at the same time call on the society to pay more attention to urban environmental sanitation and create a beautiful urban environment.