A device that reads, writes, or erases data on a storage medium, for example, a small electromagnet used to read, write, or erase data on a magnetic drum or magnetic tape.是什么意思_A device that reads, writes, or erases data on a storage medium, for example, a small electromagnet used to read, write, or erase data on a magnetic drum or magnetic tape.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句