08/1977-02/1983
08/1977-08/1984
12/1979-08/1984
04/1979-08/1984
04/1981-08/1984
04/1981-02/1983
08/1977-04/1982
(7708- )RU25 ; (7708- )BU20,RU20..T2,T3 ;