dust jacket

dust-jacket的词性：
n.Abbr. dj（名词）缩写 dj

1. A removable paper cover used to protect the binding of a book.Also called dust cover
封皮：用来保护书的装订并能卸下的封面纸套也作 dust cover

2. A cardboard sleeve in which a phonograph record is packaged.
唱片套：用来盛留声机唱片的纸板套子