Regulation (EEC) No 688/75 of the Commission of 14 March 1975 re-establishing the levying of the customs duties on angles, shapes and sections, of iron or steel, hot-rolled, etc., falling within subheadings 73.11 A II, III, IV a) 2, b), originating in Romania, to which the preferential tariff arrangements set out in Council Regulation (EEC) No 3054/74 of 2 December 1974 apply