PC board canopy made of special engineering plastics stent and PC board (endurance plate, sun plate) assembly and become, has the strong continuous composite.
PC板雨棚由特殊工程塑胶支架和PC板材（耐力板、阳光板）组装而成，有较强的连续组合性。
Gucheng bridge is a steel tube concrete bowstring arch and variable cross section continuous beam composite system through bridge with single load plate.
古城大桥是一座下承式单承载面钢管混凝土系杆拱与变截面连续梁组合体系桥梁。
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