本路橋資料為：黃河大橋栓焊鋼桁梁高強度螺栓施擰工藝TAG標簽：黃河,大橋,工藝,高強度螺栓,栓焊鋼桁梁Bolt of high strenth of bridge of joist of steel of solder of bolt of Yellow River big bridge uses pigheaded technology
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