基本释义:

四倍密度磁盘

网络释义

1)quad density disk,四倍密度磁盘

2)double density disk,双倍密度磁盘

3)quad density,四倍密度

4)single-sided double-density diskette,单面倍密度软磁盘

5)diskette 2D,双面倍密度软磁盘

6)double-density diskette,倍密度软盘