Channel deposits consisting of sand silt and clay fill the valleys cut by a river system.
河道沉积由砂,粉沙和粘土组成,充填于河流切割的河谷之中。
Channel deposits, consisting of sand, silt and clay, fill the valleys cut by a river system.
河道沉积由砂,粉沙和粘土组成,充填于河流切割的河谷之中。
Once the rotors are fitted, they'll cut through the material, creating a channel that reduces the clearance between the propeller top and duct wall.
一旦转子安装,他们会通过减少材料,创建了一个通道,降低了螺旋桨的顶部和管壁之间的间隙。
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