Binder: (1) Device for holding loose-leaf sheets. (2) Person who does bindery work. (3) Adhesive agent in an ink, usually a varnish or resin. Also called Binding agent.

• 活页夹，（2）装订工，（3）结合剂:（1）把散张书页夹紧一起的装置。（2）装订书本的工人。（3）油墨内的粘合剂，通常是清漆或树脂。