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Keywords from Image Description:
PZL SMSZ HK rotor hub. en Rotor hub of PZL SMSZ Polish variant of Mil MiU trainer helicopter with dual controls in Finnish Aviation Museum Finnish military registry HK serial number fi PZL SMSZ Puolalainen lisenssiversio Mil MiU koulutushelikopterista Suomen ilmailumuseossa Tunnus HK kaksoisohjaus sarjanumero Lhikuva roottorikeskist