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２００２年７月８日至１０日，中国水泥协会立窑研究会在北京召开了“立窑水泥企业技术进步指南”设备征集会，立窑研究会会长李俭之、副会长丁卫东出席会议并讲话。参加会议有立窑研究会专家委员会专家、立窑水泥企业共计８８个单位，１４０余名代表。这次会议是立窑研究会成
From July 8th to 10th, 2002, the China Cement Association Vertical Kiln Research Association convened the “Building Kiln Cement Enterprise Technical Progress Guide” equipment solicitation meeting in Beijing. Li Yaozhi, the president of the Lillkiln Research Association, and Vice President Ding Weidong attended the meeting and delivered speeches. . At the meeting, experts from the expert committee of the shaft kiln research meeting and the shaft kiln cement enterprise totaled 88 units and more than 140 representatives. This meeting is a shaft kiln research meeting