【建筑工程】巨大的沙子填充过程轮式装载机推土机将沙土岩石撒入水中

https://www.youtube.com/watch?v=ObKeRJTo4Qg&list=LL&index=5&t=3s
Great Huge Sand Filling Up Process Wheel Loader Bulldozer Spreading Sand Dirt Rock Into Water