Original image: Immersion of the propeller blade in the bath, for the production of annealing, by Sergeant Dmitriev. The temperature is maintained by means of lamps - by junior sergeant Prozorov
Original image: Immersion of the propeller blade in the bath, for the production of annealing, by Sergeant Dmitriev. The temperature is maintained by means of lamps - by junior sergeant Prozorov
Original image: Immersion of the propeller blade in the bath, for the production of annealing, by Sergeant Dmitriev. The temperature is maintained by means of lamps - by junior sergeant Prozorov
Original image: Immersion of the propeller blade in the bath, for the production of annealing, by Sergeant Dmitriev. The temperature is maintained by means of lamps - by junior sergeant Prozorov