Trunnion - Wikipedia
2021-9-11 · A trunnion (from Old French 'trognon', trunk[1]) is a cylindrical protrusion used as a mounting or pivoting point. First associated with cannons, they are an important military development.[2] Alternatively, a trunnion is a shaft that positions and supports a tilting plate. This is a misnomer, as in reality it is a cradle for the true trunnion ...
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