the temporary placing on the market, for the purposes of field testing, of engines that have not been EU type-approved in accordance with this Regulation, as referred to in paragraph 4;
faoina gcuirfear innill nach bhfuil cineálcheadú AE acu i gcomhréir leis an Rialachán seo ar an margadh go sealadach, chun críocha tástála allamuigh, amhail dá dtagraítear i mír 4;