我在美国洛杉矶进修期间,使用过许多种自动售货机,但给我印象最深的,是在公共图书馆和大学图书馆门前为方便读者而设立的还书筒。还书筒象邮筒,但比邮筒略大,约有1.5米高,周长3米左右,木制或铁制,形状有圆形、有方形。它的上方设置了一个狭长的还书口,有活动盖供塞进归还的书。还书筒的正面和两侧贴有该图书馆的开放时间、开启还书筒的取书次数和时间以及简要借还规则等。有的还书筒则更简单,直接设在图书馆大门两侧 I used many types of vending machines during my fellowship in Los Angeles, USA, but what impressed me most was the easel for readers’ convenience in front of public libraries and university libraries. The book is also like a postbox, but slightly larger than the postbox, about 1.5 meters high, about 3 meters in circumference, made of wood or iron, the shape of a circle, a square. Above it, there was a long, narrow mouth, with a removable cover for the return of the book. Also on the front and side of the bookcase are the opening hours of the library, the number and timing of book opening and the brief rules on borrowing. Some books also more simple tube, located directly on both sides of the library door