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（自本协议的生效日期起），如果上述参数的增幅或降幅超过正/负百分之七（±7%），则价格指数可每隔12个月调整一次。
price indexation (as of the starting date of this agreement) can be adjusted every 12 months in case the parameters as defined above are changed plus or minus seven (7) percent.
Last Update: 2012-04-11
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生效日期
effective date
Last Update: 2016-12-04
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