postage meter
noun /ˈpəʊstɪdʒ miːtə(r)/
  /ˈpəʊstɪdʒ miːtər/
(North American English) (also franking machine especially in British English)
- a machine that prints an official mark on a letter to show that the cost of posting it has been paid, or does not need to be paid邮资机(加盖邮资已付印记)