steel-pipe-concrete-arch-bridge

[s'tiːlp'aɪpk'ɒnkriːt'ɑːtʃbr'ɪdʒ]     [s'tiːlp'aɪpk'ɒnkriːt'ɑːtʃbr'ɪdʒ]    
  • 钢管混凝土拱桥

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