etail of two gearswheel of a machine on a red background, detail of case hardening, precision mechanics, gearing

gear gearwheels sprocket gearing machine industry fit red steel two tooth toothed cog wheel part metal engineering teamwork technology concept connection machinery teeth mechanic together cogwheel mechanical mechanism gearwheel connect idea power industrial gearbox action cooperation technical transmission metallic connecting contact engineer manufacturing round engaged matching hardening accuracy fitting etail gearswheel background detail case precision mechanics gears meshing horizontal