短語(yǔ)詞組短語(yǔ)gravity -arch dam 重力拱壩RCC Gravity -Arch Dam 碾壓混凝土重力拱壩concrete gravity -arch dam 混凝土重力拱壩vierendeel gravity -arch dam 空腹重力拱壩gravity abutment of arch dam 拱壩重力墩arch gravity dam 拱形重力壩;重力拱壩hollow arch -gravity dam 空腹重力拱壩 返回 gravity arch dam