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Professional Engineer Service Solar Panel. Worker Maintenance Cleaning Replacing Solar Panel. Solar photovoltaic panel system in Industry roof. Saving Energy with Clean Power.
Anonymous mechanic in jacket and gloves while standing in workplace in automobile garage and replacing car wheel brake pad against blurred interior in daylight
auto mechanic repairs a car. A mechanic removes a car battery from the box.
Combustion engine vehicle maintenance, replace of spark plugs
Doctor hold dental implant, artificial tooth roots into jaw, root canal of dental treatment, gum disease, teeth model for dentist studying about dentistry.

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