Keywords
60-64 years, 60s, adult, american, caucasian, chemical treatment room, close-up, control, control room, detail, engineer, equipment, human hand, indoors, industrial, industry, inspector, instrument, lab, laboratory, maine, male, man, north america, north american, one person, operating, portland, research, sample, scientific experiment, senior adult, sewage, sewage treatment plant, sixties, table, technological, technology, tool box, united states, us, usa, using, water department, water testing, water treatment plant, white, working, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, u40159102