短語詞組短語gravity -arch dam 重力拱垻RCC Gravity -Arch Dam 碾壓混凝土重力拱垻concrete gravity -arch dam 混凝土重力拱垻vierendeel gravity -arch dam 空腹重力拱垻gravity abutment of arch dam 拱垻重力墩arch gravity dam 拱形重力垻;重力拱垻hollow arch -gravity dam 空腹重力拱垻 返回 gravity arch dam