title: [1st results of the use of the Soviet RPU-3-3 and RBU-3-4 automatic exposure relays].
mesh_terms: D011859:Radiography / Q000295:instrumentation*; D014586:USSR
vernacular_title: Pervye rezul'taty ékspluatatsii otechestvennykh avtomaticheskikh rele ékspozitsii RPU-3-3 i RBU-3-4