... 先张法预应力混凝土管桩 Pretensioned spun concrete piles 先张法,预拉伸 pretensioning 先张法预应力混凝土结构 tensioned prestressed concrete structure ...
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pre-tensioned prestressed concrete structure 先张法预应力混凝土结构
post-tensioned prestressed concrete structure 后张法预应力混凝土结构
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