a man fixes a machine
a man is opening some instrunment
a man is removing a car part
a man is removing a transmission filter
a man is repairing a device
a man is screwing in screws without a tool
a man is unbolting a screw from a mechanical device which may or may not be a car
a man is working on a car
a mechanic shows work on a car filter
a person changing a transmission filter on a car
a person is screwing a screw
a person opening a machine
a person shows a close up of an engine
a person unscrewing a device
a person unscrews a piece of plastic under a car
somebody is installing something electric related
someone unscrews a plastic top
taking apart pieces of an engine
unscrewing a bolt holding a square cover
a man is screwing in screws without a tool