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Radiation Systems lead gainers among area firms
Martin Marietta gains but military sales flat
The profits were slimmer and the losses deeper last year from 1989 among Washington area companies which started releasing year-end financial statements last week. Still, there were a few diamonds in the rough, particularly among defense and technology firms.
Martin Marietta Corp. of Bethesda continued its growth by reporting earning $328 million for 1990 compared with $307 million for 1989.
The government contractor pushed up its revenues to $6.1 billion from $5.8 billion at a time when many defense contractors have been struggling. Sales by the …