1syuzh. - Workers of the machine-building plant for the automatic assembly of the legs of the light bulbs; control firing and checking the burning of lamps. 2syuzh. - Start-up of an oscillating open-hearth furnace at the Makeyevka Metallurgical Plant. 3syuzh. - Snowmobiles assembled by the Gorky Aviation Technical School according to the design of engineer Veselovsky. Sled test. 4syuzh. - Movement of a car on rails with a freight car in a trailer.