2804.40 Oxygen 2804.40.00 A 2804.40.00 A 2804.40.01 C

2804.50 Boron; tellurium 2804.50.00 A 2804.50.00 D 2804.50.01 A

2804.50.02 A

2804.61 Silicon containing by weight not less than 99.99% of silicon 2804.61.00 A 2804.61.00 A 2804.61.01 A

2804.69 Silicon nes 2804.69.00 B 2804.69.10 A 2804.69.99 A

2804.69.50 B

2804.70 Phosphorus 2804.70.00 A 2804.70.00 D 2804.70.01 D

2804.70.02 A

2804.70.03 A

North American Free Trade Agreement, 1992 Oct. 7 Tariff Phasing Descriptions · 第 141 / 531 题