Hai cercato la traduzione di rays da Greco a Inglese

αυτοκινούμενα Χ-rays
mobile x-ray equipment

torpedo (= electric) rays
torpedo (= electric) rays

rays, stingrays, mantas nei
rays, stingrays, mantas n.e.i.

"temperature-dependent shift of gamma rays emitted by a solid", "physical review letters", τόμος 4, 1 Απριλίου.
"temperature-dependent shift of gamma rays emitted by a solid", "physical review letters", 4, 1 april.