➡️⚙️➡️⚙️

#gear train #cause and effect #power transmission #process #chain reaction

17⚙️💎

#17j watch #watch specification #jewel bearing #gear train #horology #movement jewels

🚂⚙️↗️

#cogwheel train #gear train #incline railway #steep climb train #rack and pinion railway #adhesion railway alternative