Feng Yun - ching answered hastily , springing up and all but overturning the opiumlamp as he did so.冯云卿陡的跳起来说,几乎带翻了烟盘里的烟灯.Overturning and sliding are seldom a factor in the design of arch dam.拱坝设计中很少考虑倾覆和滑动的问题.Overturnin...
Overturning and sliding are seldom a factor in the design of arch dam.拱坝设计中很少考虑倾覆和滑动的问题.Feng Yun - ching answered hastily , springing up and all but overturning the opiumlamp as he did so.冯云卿陡的跳起来说,几乎带翻了烟盘里的烟灯.Demonstrat...