1974年12月23—25日在开滦马家沟矿召开了编织条缝筛网技术鉴定会议。会议由开滦煤矿和北京煤炭科学研究院主持,参加会议的有科研、设计、制造、使用等17个单位,27名代表。会议期间,代表们认真学习了中共中央有关文件,学习了全国技术革新经验交 Dec. 23-25, 1974 In Majiagou, Kailuan, a technical meeting of weaving and stitching screen was held. The meeting was hosted by Kailuan Coal Mine and Beijing Coal Research Institute. There were 17 units and 27 representatives participating in the conference including scientific research, design, manufacture and use. During the meeting, delegates conscientiously studied the relevant documents of the CPC Central Committee, studied the experience of national technological innovation