前勒口和后勒口咱是真的爱莫能助..不明白是书的什么地方 但是其他的还可以翻...
From the aspect of the folds of a book jacket,its components are front cover,spine,back cover,前勒口,后勒口,and the interior page,which is unprinted most of the time.The design process of book jackets are conception,method of exhibition,and factors of design.The success of jacket designing is largely depended on a good color processing and a good graphic design.
那俩词若楼主加以解释 咱或许还能知道是叫啥..