sediments on alluvial bed
ebullated bed ebullating bed
ebullated bed reactor ebullating bed reactor
ebullating bed reactor ebullated bed reactor
Alluvial
冲积
冲
沉
洪积
河
砂矿
潮土
棕色
砂金
冲积的
冲积扇
冲积性多泥沙游荡型河流
淤积层
冲积锥
alluvial cone in the front area of mountains