https://goldenmidas.net/story.php?title=agriculture-has-extended-attracted-federal-assist-ucl-wiki Inside it's the kind of mechanism found in each wind-up toy or mechanical watch: a continuing-force spring and a gear discount mechanism. The shaft goes by means of a shaft seal to maintain water out and grease in, and all the mechanism is designed to never require any upkeep. Tue, 29 Dec 2020 17:14:56 UTC en