an assembly of interrelated parts metal components a variety of shapes and sizes nuts, bolts, and screws levers, cogs, and gears connectors and linkages a control system or motor
mechanism which is an assembly of interrelated parts mechanism which has metal components mechanism which is a variety of shapes and sizes mechanism which has nuts, bolts, and screws mechanism which has levers, cogs, and gears mechanism which has connectors and linkages mechanism which is a control system or motor