tariff wall

n.

关税壁垒（指征收极高的进口关税以阻止或限制外国商品输入的措施）；

State Tariff Walls
Tariff Walls and Commercial Policy
The irony of high tariff walls
Breaking Down the Tariff Walls
Lowering Our Tariff Wall by Trade Agreements
WTO Focus On Nontariff Walls To Importation
EEC Tariff Walls: No Ministep But No High Hurdle Either
Clay advocates high U.S. tariff wall, March 30, 1824
The Key Stone in the Carbon Tariff Wall: The Alberta Oil Sands and the Legality of Taxing Imports Based on Their Carbon Footprint
‘The map that would save Europe’: Clive Morrison-Bell, the Tariff Walls Map, and the politics of cartographic display