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青岛市邮电局车辆修配厂于1973年10月份研制成功的晶体管平信收寄机,经试用和改进于1974年开始小批量生产。该机主要用于收寄八分平信,1、2、5分硬币可任意拼凑使用。当投足8分时,“投信口”打开,同时将“投币口”封闭,并在投信口上方显示“请投信”字样。如投币超过8分吋,机器可找零。信函投入“投信口”后,经滚信轮盖上“邮资已付”戳记,并通过光电管控制的延
Qingdao City Post Office vehicle repair plant in October 1973 developed a transistor letter receiver, the trial and improvement in 1974 began small batch production. This machine is mainly used for sending and receiving eight points flat, 1,2,5 points coins can be any patchwork. When voted 8 points, “investment letter mouth” open, at the same time “coin mouth” closed, and at the top of the investment letter shows “please vote letter” message. If the coin more than 8 minutes inch, the machine can find zero. Letter into the “investment letter mouth”, after the letter on the roll cover “postage paid” stamp, and through the photocell control of the extension