magnetic track; track磁道数, 磁道号: track number磁道 磁迹: magnetictrack磁道宽: track width磁道数: track number磁道她: track index下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:磁道,即可在微信中查询翻译