The cost, too, fell, because slag is free, whereas clay costs money.There is, of course, the problem of customers.
成本也有所降低，因为废料是免费的，只有粘土需要用钱购买。当然，消费者是个问题。
2
The hard shell course on soft clay foundation has such characters as stress distribution, back berm, lagging behind of settlement and closed action.
天然双层软土地基上的硬壳层具有应力扩散、反压护道、沉降滞后和封闭作用等特征。
3
And the boundary of them has the same lithologic character: the ravinement surface of river course or exposure mudstone of flooding plain and root clay.