Principle 12. Equipotentiality

1. In a potential field, limit position changes (e.g. change operating conditions to eliminate the need to raise or lower objects in a gravity field).
   Spring loaded parts delivery system in a factory
   Locks in a channel between 2 bodies of water (Panama Canal)
   "Skillets" in an automobile plant that bring all tools to the right position (also demonstrates Principle 10, Preliminary Action)