预制预应力管状桩
precast prestressed tubular pile
预制预应力混凝土
precast prestressed concrete
预制预应力混凝土单元
precast prestressed concrete unit
预制预应力混凝土技术
prefabricated prestresed concrete technology
预制预应力混凝土框架
precast prestressed concrete frame
预制预应力混凝土梁
precast prestressed concrete beam
沉井制作
caisson manufacture
fabrication of open caisson
30m缺陷预制箱梁
30m-defected precast box beam
60m预制混凝土箱梁
60 m precast concrete box girder