cartridge pen
noun [ C ] UK uk/ˈkɑː.trɪdʒ ˌpen/ us/ˈkɑːr.trɪdʒ ˌpen/
（墨水囊用完后可替换的）芯式笔
a pen in which there is a plastic cartridge filled with ink, which can be replaced when it is empty
Synonym: fountain pen
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