Mechanical drawing of a toggle switch, showing the Lever, Nut, Action Spring, Indication Plate, Terminal, and… Crust.
https://mastodon.sdf.org/system/media_attachments/files/111/235/139/857/813/223/original/a8037cb42f8e4c8e.png
Inside the switch crust, of course, you find the delicious, electric-filled center.
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