Two men workers cleaning the exterior windows of a skyscraper - industrial alpinism - hanging on ropes
Two men workers in red and yellow work clothes cleaning the exterior windows of a skyscraper - industrial alpinism
A man worker hanging on ropes by the exterior windows of a skyscraper and cleaning them - industrial alpinism
Two men workers in red and yellow work clothes cleaning the exterior blue windows of a skyscraper - industrial alpinism
Two men workers in red and yellow work clothes cleaning the exterior windows of a business skyscraper - industrial alpinism
A man worker hanging on ropes by the exterior windows of a skyscraper - industrial alpinism
A man worker hanging on ropes by the exterior windows of a business skyscraper and cleaning them - industrial alpinism
Three men workers hanging on ropes by the exterior windows of a skyscraper - industrial alpinism
A man worker hanging on ropes and wipes the exterior windows of a business skyscraper - industrial alpinism
A man worker hanging on ropes and wipes the exterior windows of a business skyscraper - industrial alpinism - overcast weather
Two men workers hanging on ropes by the exterior windows of a business skyscraper and cleansing them - industrial alpinism - overcast cold weather
Two men workers hanging on ropes by the exterior windows of a business skyscraper and cleansing them - industrial alpinism - autumn time and overcast weather