NO129988B
KINNUNEN J,SF, LINDSJOE O,SF, RASTAS J,SF, BRYK P,SF, NYHOLM E,SF, POIJAERVI J,SF, HONKASALO J,SF, KANGAS J,SF, HAANI M,SF
Year of Publication 24.06.1974
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Year of Publication 24.06.1974
Patent