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为了交流经验,推动中氮行业的技术进步和经营工作,全国中氮情报协作组于1998年8月20日在乌鲁木齐市召开了全国中型氮肥厂技术交流会暨全国中氮情报协作组第15次年
In order to exchange experience and promote the technical progress and management of the nitrogen industry, the National Nitrogen Information Cooperation Group held the 15th National Medium-sized Nitrogenous Fertilizer Plant Technical Exchange Conference and the National Intermediate Nitrogen Information Cooperation Team on August 20, 1998 in Urumqi. year