特殊用法debased coinage1.减色铸币debasing coinage1.降低铸币成色decimal coinage1.十进位币free coinage1.自由制造（货币）gratuition coinage1.免费铸造gratuitous coinage1.免费铸币制international coinage1.国际铸币limited coinage1.限制铸造substitutionary coinage1.代用铸币