环衬
词典lining papers：环衬。
1. end paper：书背 book back | 环衬 end paper | 毛本 untrimmed book
2. liningpapers：lining paper ==> 衬纸 | lining papers ==> 环衬 | lining pen ==> 直线笔
3. end pape：书背 book bac | 环衬 end pape | 毛本 untrimmed boo