...of the Walnut Lane precast PC bridge in Philadelphia. 的...
并且那里是我们谈论地面展示的整体系列。 [translate] ayou work on reception 您在招待会工作 [translate] athe history of PC bridges began with the construction of the Walnut Lane precast PC bridge in Philadelphia. 个人计算机桥梁的历史从核桃车道被已造形的个人计算机桥梁的建筑在费城开始了。 [translate] ...