Council Regulation (EC) No 2320/97 of 17 November 1997 imposing definitive anti-dumping duties on imports of certain seamless pipes and tubes of iron or non-alloy steel originating in Hungary, Poland, Russia, the Czech Republic, Romania and the Slovak Republic, repealing Regulation (EEC) No 1189/93 and terminating the proceeding in respect of such imports originating in the Republic of Croatia