A water tariff structure with step-wise increase or decrease of the price per unit water from one block to the next.
一种水价结构,水的单价从一个水量段到下一个水量段逐步增加或者减少。
2
China has cut its customs tariffs step by step, as promised, and by 2005 its average tariffs had been reduced to 9.9 percent, and most non-tariff measures had been cancelled.