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Elenco principal

• 
  Николай СимоновIvanov, factory worker and inventor
• Пётр КузнецовDukalskiy, engineer from Moscow
• Наталья РазумоваNastya, Ivanov's fiancée
• 
  Сергей ТроицкийKraft, technical office representative
• Petr ShidlovskyBabkin, jewelry shop owner
• Alexandr RzheshevskyImportant man