乙: the second of the ten Heaven ...级: level; rank; grade锅炉: boiler; furnace油: oil; fat; grease丙级锅炉油: bunker c fuel甲级锅炉油: bunker a fuel锅炉油: boiler oil船用a级锅炉燃料油: bunker a fuel oil船用b级锅炉燃料油: bunker b fuel oil船用c级锅炉燃料油: bunker c fuel oil釜底燃料油,锅炉油: bunker fuel oil锅炉油, 石油锅炉燃料, 燃料油: boiler oil乙级: b grade; junior; second division乙级队: second division乙级乳: grade b milk甲乙级工程: category ab乙级(贝塔)风险: beta risk乙级（指货品）: b grade乙级风险: beta risk乙级海员,水手: crew乙级检验: class b inspection乙级联赛: minor league乙级面粉: medium patent乙级央粉: medium patent乙级装甲: class b armour
