bindern.缚者；用以绑缚之物；活页封面；粘合剂；活页夹Binderless binding无胶胶合Binders for casting铸造用粘结剂binder precipitation基料沉淀binder concentration粘合剂含量binder arched bridge系杆拱桥Binderless fiberboard无胶纤维板binder-rich vehicle高树脂分漆料binder-moving lever打捆装置移动杆binder-aggregate ratio胶砂比binder for tractor draft机引割捆机