off-grade goods等外品
off-grade iron[材] 不合格铁
off-grade detail等外
off-grade alumina不合格的氧化铝
off-grade metal不合格钢;等外金属;规格外金属;不合格金属
off-grade glass不合格玻璃
off-grade plate[材] 等外板
off-gauge grade超限等级
off-grade product[工经] 等外品