binder
/ˈbaɪndə(r)/noun
1- a thing or person that binds something, in particular起装订（或捆扎、黏合）作用的东西（或人）, 尤指：
1.1
- a cover for holding magazines or loose sheets of paper together杂志封面, 活页夹。
1.2
- a substance that acts cohesively黏合剂, 黏结料。
1.3
- a reaping machine that binds grain into sheaves割捆机。
1.4
- a bookbinder（书籍）装订机; 装订工。