双明信片也称回邮已付明信片(简称双片)。它是可供往返通信使用的两张相连且对折的明信片,即正片和回片,两片都贴有相同的邮资,寄信盖销正片,回信使用回片。如果将双片寄往国外,可先在正片上贴足本国邮局规定的国际明信片邮资,写上对方地址姓名,背面写信的内容,并在回片正面贴上相等值的邮资,写好自己的地址姓名,背面留给 Double postcards also known as postcards postcards (referred to as double-chip). It is available for round-trip communication with two connected and folded postcards, namely the positive and back, two are affixed with the same postage, letter denied the positive, the reply back using the chip. If you send the two-piece overseas, you can first post the international postcard postage stipulated in your national post office, write the name of the other party’s address, write the contents of the letter on the back, and post the equivalent postage on the front of the piece, and write yourself The name of the address, back left