Factory-Made
Adjustments
Decrease price by 10%, Decrease modification slots by 1 (minimum 1), While in an area where standardized parts are available (such as a major settlement), decrease repair costs by 10% and decrease repair time by 25%
Special
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Most vehicles are factory-made, use standardized parts for a particular civilization, and are relatively easy to repair, but have little room for creative modification.
Source
Tech Revolution pg. 78