保护关税论 Theory of Protective Tariff

关税同盟理论 Customs Union Theory ; theory of customs union

关税同盟论 [税收] theory of customs unions

危险点关税争论 [税收] peril point tariff argument

关税同盟争论 [税收] custom union issue

关税平熙外贸论坛 customs duty

有关税的论据 argument concerning tariffs

关税理论 tariff theory