Council Regulation (EC) No 763/2000 of 10 April 2000 extending the definitive anti-dumping duty, imposed by Regulation (EC) No 584/96 on imports of certain tube and pipe fittings, of iron or steel, originating in the People's Republic of China to imports of certain tube and pipe fittings, of iron or steel, consigned from Taiwan, whether declared as originating in Taiwan or not, and terminating the investigation in respect of imports from three Taiwanese exporters