一、概述当你收到一封来信时,在信封的背面可以见到一个圆形邮戳,这就是平常所说的“落地戳”。作为一种凭证,落地戳要求戳印清晰完整。以往加盖落地戳是在邮电局所由人工完成的。随着信函业务的发展,这种方式已越来越不适应了。据统计,目前上海一个邮电局所一天的信函投递量可达3～7万件,个别的甚至达到14万件。如此众多的信件都要在投递前短暂 I. Overview When you receive a letter, you can see a circular postmark on the back of the envelope, which is commonly referred to as “landing stamp.” As a voucher, stamped stamp landing requirements clear and complete. In the past stamped floor stamps at the post office by the manual. With the development of the letter business, this approach has become increasingly unsuited. According to statistics, at present, the postal delivery volume of a post and telecommunications bureau in Shanghai can reach between 30000 and 70000 or even 140000 in some cases. So many letters have to be short before delivery