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bridge
Military bridges are of 3 main types : 1. scissor-type launched bridges (foldable and often laid by an armored vehicle); 2. floating (or pontoon or ribbon) bridges (several flotation units are assembled side by side to span a river, but are transported folded); 3. dry support bridges (e.g. Bailey bridges), built of standardized panels and used for lines of communication (highways and railways)
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