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1977年4月13—16日黑龙江省煤炭工业局在鹤岗矿务局召开了全省洗煤工作经验交流会。参加会议的有各矿务局和洗煤厂的工人、领导干部和技术人员的代表共一百多名。与会代表认真学习了毛主席《论十大
April 13-16, 1977 Heilongjiang Coal Industry Bureau held a coal-washing experience exchange meeting in Hegang Mining Bureau. More than 100 representatives of workers, leading cadres and technical personnel from various mining bureaus and coal washing plants attended the conference. The delegates seriously studied Chairman Mao "on the top ten