Development of the Zhongyuan Oilfield in east China's Henan Province has been under way for more than 20 years. In recent years, however, the oil field has been plagued with mounting problems...
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Development of the Zhongyuan Oilfield in east China's Henan Province has been under way for more than 20 years. In recent years, however, the oil field has been plagued with mounting problems...