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Concetrated preteen boys and girls studying movement of contemporary dance in classroom with his friends
Siblings playing in backyard - children drawing with chalk on paving
Two concetrated young businessmen talking and writing on glass board in office
Happy healthy kid boy with glasses making school homework at home with notebook. Interested child writing essay with helping of internet. concetrated schoolchildren concept
Replacing a glass unit. Concetrated man is using a vacuum cups to hold a pane of glass. Repair and refurbishment of old windows.

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