white planet gears inside a ring cogwheel of epicyclic gear train on blue background

abstract accuracy annular artistic background blue case closeup cog cogged cogs cogwheel connect cooperation copy curve dark design detail disassembled dismantled drill educative engine engineering epicyclic equipment external gear gearbox gears gearwheel gun industrial industry inside interlock internal involute machine machinery mechanic mechanical mechanism metal metallic nobody nopeople open part planet planetary plastic polyamide power precision quality repair ring rotate round screw service space spare steel technical teeth tool train various wheel wheels white