1syuzh. - Leningrad. Leningrad Telephone Plant "Krasnaya Zarya" (formerly Erickson): plant buildings, workers assembling automatic telephone exchange units, telephone sets, finished products. 2syuzh. - Moscow. 1st All-Union Congress of the Trade Union of Workers of the Coal Industry: meeting room, delegates in the hall, presidium. General Secretary of the All-Union Central Council of Trade Unions N. Shvernik speaking. 3syuzh. - Ural. Kizelovsky coal mines: a mine, miners chop coal by hand, using a pneumatic drill, a cutting machine is working, loading coal onto a conveyor, into trolleys, the movement of trolleys in a mine, along an overpass, a bridge. 4syuzh. - Verkhneudinsk (since 1934 Ulan-Ude): drawing of a wood-cutting machine; workers dismantle sawn wood, stacks of wood.