The bridge structure is formed by the inside and outside arcend carriage and the upper and lower retractable main girder, with compact structure, light weight and beautiful and dignified appearance.
内外弧形端梁与上下层伸缩式主梁构成的桥架结构紧凑,重量轻巧,美观实用。
2
Yellowstone is at the northeastern end of the Snake River Plain, a great U-shaped arc through the mountains that extends from Boise, Idaho some 400 miles (640 km) to the west.