淨(jing)空(kong)3米(mi)拱(gong)型(xing)骨(gu)架示意圖
2.5米拱(gong)型骨(gu)架示(shi)意圖
淨(jing)空2.6米拱形(xing)骨(gu)架(jia)示意圖(tu)
施(shi)工現(xian)場(chang)