precast segmental assembly box girder formwork elevated expressway column structure road construction site |
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| navigate by keyword : architecture background bridge cantilever column concrete construction development elevated equipment expressway formwork foundation gantry girder high highway industrial industry infrastructure installing iron launching metal modern outdoor overpass pier segment pillar precast prefabricated project road safety site sky street structure support tall transport transportation typical unfinished urban viaduct |
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| Precast segmental assembly box girder formwork on elevated expressway column structure in road construction site against blue sky background |
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