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1．第四届全国建筑电器与楼宇智能设备展览会1999．3．31～4．3（A）2．中华电脑巡回展lop．4．8～4．11田）3．＇99天津春季全国商品交易会lop．4．18～4．24A、B。C。D）4．＇99全国通信产品春季展示交易会1999．4．26～4．28（A、B）5.第五届国际表面处理技术与设备展览会19
1. The Fourth National Building Electrical Equipment and Building Intelligent Equipment Exhibition 1999.3.31 ~ 4.3 (A) 2. China Computer Tour Exhibition lop. 4.8 ~ 4.11 field) 3. ’99 Tianjin Spring National Fair lop. 4.18 ~ 4.24A, B. C. D) 4. ’99 National Communication Products Spring Fair 1999.4.26 ~ 4.28 (A, B) 5. Fifth International Surface Treatment Technology and Equipment Exhibition 19