The reserve costs of China Petro-Chemical Corporation from 1986 to 2002 are calculated by the different statistical methods of year mean, cumulative mean and running mean.
最后按照单年平均、累计平均和移动平均等不同统计方法，对中石化所属油田的油气储量成本进行了测算和分析。
The reserve costs of China Petro-Chemical Corporation from 1986 to 2002 are calculated by the different statistical methods of year mean, cumulative mean and running mean.
最后按照单年平均、累计平均和移动平均等不同统计方法，对中石化所属油田的油气储量成本进行了测算和分析。
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