2839.11 Sodium metasilicates 2839.11.00 A 2839.11.00 A 2839.11.01 C

2839.19 Silicates of sodium nes 2839.19.00 A 2839.19.00 A 2839.19.01 C

2839.19.99 C

2839.20 Potassium silicates 2839.20.00 A 2839.20.00 A 2839.20.01 B

2839.20.02 A

2839.90 Silicates of metals nes; commercial alkali metal silicates 2839.90.00 D 2839.90.00 A 2839.90.01 C

2839.90.02 A

2839.90.99 B

2840.11 Disodium tetraborate (refined borax) anhydrous 2840.11.00 D 2840.11.00 A 2840.11.01 A

2840.19 Disodium tetraborate (refined borax) hydrated 2840.19.00 D 2840.19.00 A 2840.19.01 D

North American Free Trade Agreement, 1992 Oct. 7 Tariff Phasing Descriptions · 第 182 / 531 题