Jisho

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Noun
1. blank cartridge; blank ammunition; blank
Wikipedia definition
2. Blank (cartridge)A blank is a type of cartridge for a firearm that contains gunpowder but no bullet or shot. When fired, the blank makes a flash and an explosive sound (report). Blanks are often used for simulation, training, and for signaling. Blank cartridges differ from dummy cartridges, which are used for training or function testing firearms; these contain no primer or gunpowder, and are inert.
Read “Blank (cartridge)” on English Wikipedia
Read “空包” on Japanese Wikipedia
Read “Blank (cartridge)” on DBpedia

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