In the appreciate time, the profits of both sides of supply and demand are increased by the time going in each period, the product price and the demand quantity also assume the trend of escalation.
在升值期中，供需双方在各补货周期内的利润随时间推移而增加，且产品价格和需求量也呈上升趋势；
2
A fix price contract with escalation.
标价伸缩合同。
3
As what we have signed is a fix - price contract with escalation, the price can be changed without notice.