A serious gas explosion rocked a coal mine in the city of Jixi, Heilongjiang Province, on June 20.When the explosion occurred, 139 people were working underground, including Zhao Wenlin, General...
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A serious gas explosion rocked a coal mine in the city of Jixi, Heilongjiang Province, on June 20.When the explosion occurred, 139 people were working underground, including Zhao Wenlin, General...