Complex sentence: During the 1970s & 1980s, the arms production of Zbrojovka Brno accounted for less than 3% of its total capacity, as production was shifted to the manufacture of typewriters, diesel motors, and automatic machine tools.
Split into simpler sentences: During the 1970s & 1980s, the arms production of Zbrojovka Brno accounted for less than 3% of its total capacity. The activities of this company were deverted into the production of typewriters, diesel motors, and automatic machine tools.