[稅收] 關稅優(yōu)惠差額 tariff preference: 關稅特惠; 關稅優(yōu)惠; 特惠關稅優(yōu)待margin of preference: 優(yōu)惠差額; 優(yōu)惠幅度preference margin: 特惠待遇差額;優(yōu)惠差額tariff margin: 關稅幅度british preference tariff system: 英聯(lián)邦特惠稅制下載手機詞典可隨時隨地查詞查翻譯