8540.49 Microwave tubes, nes 8540.49.00 A 8540.49.00 A 8540.49.99 A
8540.81 Receiver or amplifier valves and tubes 8540.81.00 A 8540.81.00 A 8540.81.01 A
8540.81.02 A
8540.81.99 A
North American Free Trade Agreement, 1992 Oct. 7 Tariff Phasing Descriptions · 第 471 / 531 题