In Russian. Rotenberg, Alexander Grigorievich. High-speed freezing gravity conveyor belt device GKA-4. Moscow: Food industry, 1976. Skoromorozil'nyy gravitatsionnyy konveyernyy apparat GKA-4. In Russian /GKA-4 high-speed gravity conveyor belt . All images are for identification of editions only. Several books of the same edition may be available. Please feel free to request photos of available books. SKU6972140