e/20 mm caliber

Information
has gloss	eng: The 20 mm caliber is a specific size of cannon or autocannon ammunition, commonly the smallest caliber which is unambiguously a cannon (or more commonly today, autocannon) and not a heavy machine gun.
lexicalization	eng: 20 mm caliber
lexicalization	eng: 20mm caliber
instance of	c/Large calibre cartridges

Meaning
Japanese
lexicalization	jpn: 20mm口径弾