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第一期数控型精密液压校直机压点压下量的数学模型…………………………………徐翔（1）AUt。CAD用户级系统界面设计………………………………………梅志千郑长宏（6）正项级数敛散性判别法的推广……………………………………………………赵泽茂（13）智能卡的安全措施………
The Mathematical Model of the Pressing Point Pressing of the First Stage Numerical Control Precision Hydraulic Straightening Machine. CAD user-level system interface design ............................................. Mei Zhi-zheng Zheng Chang-hong (6) Promotion of Discriminant Discrepancy Law of Positive Series ................................. ........................... Zhao Zemao (13) Smart Card Security .........