Complex sentence: Now SMURD is a complementary service, with a lot of bases in the whole Romania, still expanding, that services the worst emergency cases in a good collaboration with the traditional Ambulance (Serviciul de Ambulanţă).
Split into simpler sentences: Now SMURD is a complementary service, with bases covering many parts of the country, still expanding. It deals with the worst emergency cases, all in a very good collaboration with the regular Ambulance Service (Serviciul de Ambulanţă).