6810.20 Pipes of cement or concrete 6810.20.00 B 6810.20.00 A 6810.20.01 B

6810.91 Prefabricated structural components of buildings etc of 6810.91.10 A 6810.91.00 A 6810.91.01 B

6810.91.90 A 6810.91.99 A

6810.99 Articles of cement, of concrete or of artificial stone nes 6810.99.00 A 6810.99.00 A 6810.99.99 B

6811.10 Corrugated sheets of asbestos-cement, of cellulose fibre-cemen 6811.10.00 A 6811.10.00 D 6811.10.01 A

6811.20 Sheets nes, panels/tiles etc of asbestos-cement, cellulose 6811.20.00 A 6811.20.00 D 6811.20.01 A

6811.20.99 A

6811.30 Tubes, pipes & tube or pipe fittings of asbestos-cellulose 6811.30.00 B 6811.30.00 A 6811.30.01 B

6811.30.99 B

6811.90 Articles nes, of asbestos-cement of cellulose fibre-cement or 6811.90.00 B 6811.90.00 D 6811.90.99 B

North American Free Trade Agreement, 1992 Oct. 7 Tariff Phasing Descriptions · 第 372 / 531 题