sets of gears, cogwheels made of steel and brass on white background with shadow reflection. helical and spur gears,some

and background bearing brass clockwork closeup cog cogs cogwheel cogwheels connection cooperation copper curved cut cylinder dry engine engineering fixed gear gears hang helical industrial industry interlock isolated machine machinery macro made mechanical mechanics mechanism mesh metal metallic motion not parallel pitch pitched power reflection root sets shadow shafts some sprocket spur steel straight teeth together tooth torque transmission wallpaper wheel wheels white work