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由中国煤炭机械工业协会主办的煤炭机械企业专利工作研讨会1993年元月5～12日在召开。参加会议的有31个单位56名代表。研讨会期间,中国煤机专利技术服务中心与中国专利局国际联机正式开
The patent workshop on coal machinery enterprises sponsored by the China Coal Machinery Industry Association was held from January 5 to December 12, 1993. Attending the meeting were 31 delegates and 56 representatives. During the seminar, the China Coal Machine Patent Technical Service Center and the China Patent Office officially opened