15 cm sIG 33–歩

ザ 15センチのsIG 33 (schweres Infanterie Geschütz 33, lit. “heavy infantry gun”) was the standard German heavy infantry gun used in the Second World War. It was the largest weapon ever classified as an infantry gun by any nation.[1] Its weight made it difficult to use in the field, and the gun was increasingly adapted to various ad hoc mobile mountings. These were generically referred to as the SIG 33

ソース： ウィキペディアの15 cm sIG 33