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在《集邮博览》2017年第6期刊登的《暗藏玄机的北京新一代邮政日戳》一文中,作者希望为北京“公主坟南口”日戳中的“暗藏玄机”揭秘。现就此概述如下:北京邮政使用浙江南方邮电科技公司生产的日戳约有10年,该厂日戳时点左右镌有“Z”和“Y”二字母,确属厂名缩写:Z=浙江、Y=邮电。并非有人理解的“邮政”。至于上半环北京地名左右的“浔”“(代)”“1”等较浅字迹,是在采用电火花加工工艺制作日戳过程中,需要在石墨电极模板上精刻凹陷的正向日戳文字,而在前一次制作模板时使用的“浔”等字样的凹槽痕
In the essay entitled “Hidden Mysteries of Beijing’s New Generation Post Date,” published in Issue 6, 2017, “Philatelic Expo”, the author hopes to unveil a secret in Beijing’s “Princess Tombs south exit” date stamp. Now this is summarized as follows: Beijing Post uses the stamp produced by Zhejiang Southern Post & Telecommunication Technology Company for about 10 years. The plant’s letter “Z” and “Y = Zhejiang, Y = postal. Nobody understands that ”postal“. As for the upper half ring around Beijing place names () ”“ 1 ”and other shallow writing, is the use of EDM manufacturing datestamp process, the need to engrave the graphite electrode template Sagging positive date stamp text, and used in the previous template used “浔 ” and other words groove marks