随着工程环境的变化施工制约条件越来越严格，安全、快速施工的要求也越来越高。
The constrained conditions of construction for big-scale urban interchange bridges are more and more strict, and the requests of safe and rapid construction are increasing higher and higher.
随着工程环境的变化施工制约条件越来越严格，安全、快速施工的要求也越来越高。
The constrained conditions of construction for big-scale urban interchange bridges are more and more strict, and the requests of safe and rapid construction are increasing higher and higher.
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