Please do not use any application folders, clear plastic folders or loose-leaf binders to secure yur documents.
也就是说不必使用任何文件夹，透明文件夹，以及活页夹来固定文件。
Accessories: there are metal hook buckle, documents, folders and so on, the aircraft plastic buckle, insert buckle, safety buckle and etc.
配件：通用的配件有金属的勾扣、证件夹等，塑胶的有飞机扣、插扣、安全扣等。
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