2) stiff steel frame arch bridge
劲性钢骨架拱桥
3) stiffen framework reinforced concrete arch bridge
劲性骨架砼拱桥
4) more degrees skeleton concrete arched bridge
劲性骨架混凝土拱桥
1.
Making and construction of the concrete by pump in more degrees skeleton concrete arched bridge;
劲性骨架混凝土拱桥泵送混凝土配制与施工
补充资料:歇劲
1.歇力。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条