こうけい
口径
1. aperture; bore; calibre; caliber
2. CaliberIn guns including firearms, caliber or calibre is the approximate internal diameter of the barrel in relation to the diameter of the projectile used in it. In a rifled barrel, the distance is measured between opposing lands or grooves; groove measurements are common in cartridge designations originating in the United States, while land measurements are more common elsewhere. It is important to performance that a bullet should closely match the groove diameter of a barrel to ensure a good seal.
Read “Caliber” on English Wikipedia
Read “口径” on Japanese Wikipedia
Read “Caliber” on DBpedia
Read “Caliber” on English Wikipedia
Read “口径” on Japanese Wikipedia
Read “Caliber” on DBpedia
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