A high-yielding oilfield has been built at high speed in Jenchiu on north China's central Hopei plain.Average daily output of each of the wells there tops 1,000 tons, and the output of only a dozen...
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A high-yielding oilfield has been built at high speed in Jenchiu on north China's central Hopei plain.Average daily output of each of the wells there tops 1,000 tons, and the output of only a dozen...