double density disk 双倍密度磁盘

double density floppy disk 双密度软盘 ; 双密度软碟 ; 双密度软磁盘

double sided quad density disk 双面四倍密度磁碟

double sided high density disk 双面高密度磁碟 ; 双面高密度磁盘

Double-Density Compact Disk 双密度光盘 ; 格式

double density floppy disk drive 双密度软磁盘机

single-sided double-density floppy disk drive 单面双密度软盘机 ; 单面双密度软磁盘机

single-sided double-density floppu disk drive 单面双密度软磁盘机

two-sided double-density floppy disk drive 双面双密度软磁盘机