parameter ( 4k, best quality , realistic )architecture, bridge construction, cross the valley, elevation of the bridge is below 24 meters, the bridge may not exceed an elevation 32.5 meters, simple supports, Each main truss can have no more than 100 and no more than 200, Medium-strength concrete requires a deck thickness of 23 centimetres, High-strength concrete requires a deck thickness of 15 centimetres , bridge deck will be 10 meters wide
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