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Кузьма Ястребецкий

Lopatin

Николай Акимов

Factory secretary

Viktor Arkasov

Worker (uncredited)

Иван Мутанов

Worker (uncredited)

A. Genin

Nahum Beychik, inventor

Василий Бокарев

Surkov, master

Александр Дулетов

Kuzma, Surkov's son

Ye. Bondina

Lopatina

Т. Соколовская

Nadya

F. Tarasov

Worker

S. Stepanov

Worker

V. Snezhinskaya

(uncredited)