truss type steel structure
... 恒温膨胀阀 thermostatic expansion valve 桁架式钢结构 truss type steel structure 横带 rail ...
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无论是钢结构还是混凝土结构，空心的箱型结构对承梁和桥墩都比钢梁桁架式结构好。
Hollow box structures for both the deck and piers, whether of steel or concrete, are better than steel trussed structures.
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