以西北东北华北地区为基础业务辐射整个中国。
To the northwest northeast north China based business radiation throughout China.
石油主要蕴藏在西北地区，其次为东北、华北地区和东部沿海浅海大陆架。
Petroleum reserves are mainly in northwest and also in northeast China, north China and the continental shelves in east China.
实际使用表明，该油品适用于中国东北及华北地区，性能良好，具有较长的使用寿命。
The oil product has shown good performances and longer life period in practical applications, and is suitable for use in regions of northeast and north China.
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