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svn:author
V 5
cazfi
K 8
svn:date
V 27
2009-06-02T15:00:05.673191Z
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V 156
Added effect type Tech_Cost_Factor. It is used in civ/2 rulesets to double
research costs at year 1. Old tech_cost_double_year is removed. 

See gna #13608

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