Formerly, a maker of weapons, shields, etc.

昔时之制造武器甲胄者。

Also, one who had charge of the military outfit of another, as of a knight.

保管武器及甲胄者(如代武士保管甲胄者)。

One that makes armor or arms.

武器(甲胄)制造者。

The keeper of the weapons of a troop or battleship.

(部队或军舰的)军械保管人。