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1974年12月16日至23日,河北省冶金局在承德钢铁厂召开全省选矿科技情报工作经验交流会,到会的有省内冶金生产厂矿、科研、设计单位的代表。 会议传达了省委关于1975年在工业战线打好钢铁、焦炭、化肥和柴油机等四个硬仗的指示,指示中强调要首先打好钢铁硬仗,贯彻高炉吃精料的方
December 16, 1974 to 23, Hebei Metallurgical Bureau held in Chengde Iron and Steel Mill beneficiation scientific and technological intelligence work experience exchange meeting, to the meeting of the province metallurgical production plant, scientific research and design unit representatives. The meeting conveyed instructions of the provincial party committee on laying down four hard battlefields of steel, coke, chemical fertilizer and diesel engine on the industrial front in 1975. The directive emphasized that we should first lay down steel hard battle and implement the prescription