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。
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.
中国依照承诺逐步降低关税，2005年平均关税水平已降到9.9%，并取消了大多数非关税措施。
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.
中国依照承诺逐步降低关税，2005年平均关税水平已降到9.9%，并取消了大多数非关税措施。
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