A disk unit that has read / write heads that are fixed in position. In such systems, one head is needed for each track of information recorded on a disk.是什么意思_A disk unit that has read / write heads that are fixed in position. In such systems, one head is needed for each track of information recorded on a disk.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句