列れっ車しゃ砲ほう

noun

railway gun; railroad gun; railway artillery

A large artillery piece mounted on a railway carriage, used historically in warfare.

• 第だい一いち次じ世せ界かい大たい戦せんでは列れっ車しゃ砲ほうが使つかわれた。

  Railway guns were used in World War I.