Metal

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A bridge is a structure built to span a gorge, valley, road, railroad track, river, body of water, or any other physical obstacle. Designs of bridges vary depending on the function of the bridge and the nature of the terrain where the bridge is to be...

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Metal

ponts

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Le pont Luíz I est l'un des nombreux ponts de la ville de Porto. Appellé par la population locale "Ponte Dom Luis", c'est aussi le plus connu et un des plus anciens. Ce pont relie la ville de Vila Nova de Gaia à la ville de Porto. Il a été construit entre...

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metal

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Metal

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Bronze is any of a broad range of copper alloys, usually with tin as the main additive, but sometimes with other elements such as phosphorus, manganese, aluminium, or silicon. It is strong, tough and has myriad uses in industry. It was particularly significant...

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Metal

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A cannon is any large tubular firearm designed to fire a heavy projectile over a long distance. The cannon is the archetypical form of artillery.Cannon comes through Old French from Old Italian cannone, ultimately derived from Latin canna—a tube. The...

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metal

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In chemistry, a metal (Greek: Metallon) is an element that readily loses electrons to form positive ions (cations) and has metallic bonds between metal atoms. Metals form ionic bonds with non-metals. Metals are sometimes described as a lattice of positive...

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metal

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