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一般的邮筒只有一个或二个投递口,信投进去后都混在一起,先拣后分,费时又费办。上海的李文彪同学设计了一个新式邮筒。这个邮筒有三个投递口,分别投寄本市、外地和航空邮件。邮筒里分成三格,而且能旋转。这样,邮递员开门取信时,只要转内格,就可以按类取信了。由于收信后不用再拣,就省事多了。这个小发明就是从增加投递口的个数入手设计的,它在第一届全国青少年创造发明比赛中获得了一等奖。
The general postbox has only one or two delivery port, the letter mixed into the mix, the first pick after the points, time-consuming and expensive to do. Shanghai Li Wenbiao students designed a new postal. This postbox has three delivery port, respectively, posting city, field and airmail. The mailslot is divided into three compartments, and can rotate. In this way, the postman to open the door to receive a letter, as long as the transfer of character, you can get a letter by class. Since the receipt do not have to pick, save more. This little invention is designed to increase the number of delivery port, which won the first prize in the first National Youth Creation Invention Competition.