franking

franking
noun
  1. [mass noun]the action of franking a letter or parcel
    盖邮戳于(信,包裹)(表示邮资已付或免费投递)
    [as modifier]a franking machine.
    邮资机。
    ■[count noun]an official mark or signature on a letter or parcel to indicate that postage has been paid or does not need to be paid
    免费投递戳(或签字);邮资已付戳(或签字)
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