理学 计算机输入输出设备 释 magnetic card machine 磁卡机 一种读写磁卡数据的设备，可以实现对磁卡数据的读取和写入。
计算机硬件 输入输出设备 释文 magnetic card machine 磁卡片机
- background density .01.02 波动光学、信息光学
- background electrolyte
- background electrolyte (BGE)
- background elimination
- background extinction
- background extinction rate
- background field
- background fluctuation
- background fog
- background galaxy
- background galaxy cluster
- background glow
- backgrounding
- background intensity
- background investigation
- background limited detectivity
- background mass spectrum
- background mathematics
- background mode
- background monitoring
- background music
- background noise
- background-noise level
- background optical and electromagnetic characteristic
- background projection process