Two-EC双变量误差修正twonum.二；两个Two-Bit Differserv Implementing Policy Study两比特区分服务实现策略研究two-dimensional engineering drawing creation二维工程图创建two-dimensional linear discriminate analysis二维线性可分性分析Two-phase permanent magnet synchronous motor两相永磁同步电动机two-dimensional reversible non-linear maps二维可逆非线性映射Two cases underwent Caldwell-Luc' surgery.two-channel EEG automatic frequency analyser二导脑电自动频率分析器two/three pressure control conversion value二三压力转换阀two-dimensional source representation method二维源分布法two-dimensional zero-pressure gas dynamics二维零压气体动力学系统