A SIZABLE number of wells have been drilled and put into operation annually at the Shengli Oilfield in the Pohai Bay area since the Great Proletarian Cultural Revolution started in 1966 and state...
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A SIZABLE number of wells have been drilled and put into operation annually at the Shengli Oilfield in the Pohai Bay area since the Great Proletarian Cultural Revolution started in 1966 and state...