Jisho

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水平対向12気筒
Wikipedia definition
1. Flat-twelve engineA flat-12 is an internal combustion engine in a flat configuration, having 12 cylinders. The flat-12 is wider (but significantly lower in height) than a V12 . Despite the advantage of having a lower center of gravity than a V12, that advantage can be somewhat offset by the need for a higher mounting height in the engine bay to provide clearance for the exhaust system (six runners on either side).
Read “Flat-twelve engine” on English Wikipedia
Read “水平対向12気筒” on Japanese Wikipedia
Read “Flat-twelve engine” on DBpedia

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