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1977年4月,上海市机电一局和大屯煤矿工程指挥部,在江苏沛县召开了JKD1.85×4多绳绞车鉴定会议.参加会议的有53个单位的96名代表.
In April 1977, Shanghai Municipal Mechatronics Bureau and Datun Coal Mine Engineering Command held a JKD1.85 × 4 multi-rope winch appraisal meeting in Peixian, Jiangsu Province. There were 96 representatives from 53 units participating in the conference.