The term "133 mm artillery" generally refers to a type of artillery piece that fires projectiles with a diameter of 133 millimeters. While there is not a widely known or standard artillery caliber at exactly 133 mm, certain artillery systems may utilize a similar caliber, which could be specific to certain countries or designs. For reference, artillery is classified into various categories based on caliber, including light artillery (howitzers, mortars), medium artillery, and heavy artillery systems.
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