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河南煤田地质公司第三次科学技术大会,于1986年12月10日至13日在郑州召开.参加会议的有科技先进集体和先进个人的代表,各队
The Third Science and Technology Conference of Henan Coalfield Geology Company was held in Zhengzhou from December 10 to December 13, 1986. Participants were representatives of advanced collectives and advanced individuals from all walks of life,