three trusses
三主桁
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Cable tension plays a key role in keeping displacement coordination among three trusses in cable-stayed bridge with three main trusses.
索力对于保证三主桁斜拉桥的桁间位移协调起关键作用。
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广东东莞东江大桥主桥是一座三主桁双层桥面刚性悬索加劲钢桁梁，这是一种较为新颖的桥梁结构形式，它同时具备悬索桥与钢桁架桥的优点。
The main bridge of Dongguan Dongjiang bridge is a three main trusses steel bridge with rigid cable, is a new double-deck bridge structural style.
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