off f line mode 脱机方式

off f line output 脱机输出

off f line system 脱机系统

off f line storage 脱机存储器

off f line control 脱机控制

off f line plotter 脱机绘图机

off f line operation 脱机操作

off f line equipment 脱机设备

off f line diagnosis 脱机诊断