“回音卡”这项邮政业务,在邮电部没有决定正式开办之前,我国就有少数地方的邮电局就开始率先印制和使用。由于当时没有统一规定的名称,有的叫“回音卡”,也有的叫“回音片”。因此,“回音卡”与“回音片”就成了一对孪生兄弟。笔者在收集中得到了一枚空白的没有使用的“回音片”。由于该片收集的时间很长了,笔者现在回 “Post card” This postal service, in the Ministry of Posts and Telecommunications has not decided to officially open before, there are a few local post offices began printing and use. Because at that time there is no uniform name, some called “echo card”, some called “echo”. Therefore, “echo card” and “echo” became a pair of twin brothers. The author got a blank unused “echo” in the collection. As the film collection a long time, I now back