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印钞厂在印制钞票时,个别钞票会出现印刷缺陷,质检时,这些残次品必须抽出销毁。于是,原本连号的钞票就会出现“断号”的现象。为了把空缺补齐,使成批钞票的总数不减少,印钞厂会另外印刷一批质量合格的钞票,采用专门的冠字字母,称为补号券。第四版人民币的双冠补号券多以J、Z、N开头,如1980年版100元、50元和2元纸币,都只有一种补号————JZ。1990版50元的补号为JU、JX、ZH、ZI、ZJ五
Banknote printing banknote printing, individual banknotes will appear printing defects, quality inspection, these defective products must be removed and destroyed. As a result, even the original number of banknotes will appear “broken number ” phenomenon. In order to fill the vacancies so that the total number of banknotes does not decrease, the banknote printing factory will additionally print a batch of banknotes of acceptable quality using a special crest letter called a coupon. The fourth edition of the RMB double crown coupons to J, Z, N at the beginning, such as the 1980 edition of 100 yuan, 50 yuan and 2 yuan notes, there is only one kind of complement ---- JZ. 1990 version of 50 yuan for the complement of JU, JX, ZH, ZI, ZJ five