The Kailuan Coal Mines, first opened in 1878 and today one of China's major coal producers with 100,000 workers, doubled its output during the Fourth Five-Year Plan (1971-75). On July 28, 1976 it was...
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The Kailuan Coal Mines, first opened in 1878 and today one of China's major coal producers with 100,000 workers, doubled its output during the Fourth Five-Year Plan (1971-75). On July 28, 1976 it was...