highly-specialized russian

• гулин

  Unknown or extremely rare word in modern Russian, having no standard dictionary meaning as a common noun. Possibly a typo, an archaic or highly specialized term, or a proper name (e.g., the surname Gulin).

• мелкоте́мье

  concentration on narrow subjects, narrow specialization, prevalence of highly-specialized research

• узкоспециализи́рованное

  narrowly specialized, highly specialized, niche