Talk:Bi Type 40mm Twin Autocannon Mount/@comment-114.153.100.4-20150112054609/@comment-151.33.51.9-20160223172245

It's ビ (bi) according to japanese wikipedia. https://ja.wikipedia.org/wiki/%E6%AF%98%E5%BC%8F%E5%9B%9B%E5%8D%81%E7%B2%8D%E6%A9%9F%E9%8A%83

毘式四十粍機銃（ビしきよんじゅうミリきじゅう）