邮票，是指由国家(或地区)邮政主管部门发行的预付邮资凭证。
Stamp is a prepaid postage certificate issued by the postal administration of a country (region).
第十八条售出的邮资凭证不得向邮政企业及其分支机构兑换现金。
Article 18 Postage certificates sold shall not be cashed in postal enterprises or their branch offices.
邮资凭证是电子邮资系统服务的最终体现，邮资凭证的安全是保证电子邮资系统正常运转的重点。
Electronic stamp is the final embodiment of E-Postage service, the security of stamp is key guarantee for the E-Postage system.
邮资凭证是电子邮资系统服务的最终体现，邮资凭证的安全是保证电子邮资系统正常运转的重点。
Electronic stamp is the final embodiment of E-Postage service, the security of stamp is key guarantee for the E-Postage system.
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