ハイルブロンの主要産業は何？
The city on the Neckar is a former Imperial Free City and is the seat of Heilbronn County. Heilbronn is also the economic center of the Heilbronn-Franken region that includes most of northeast Baden-Württemberg. Furthermore, Heilbronn is known for its wine industry and is nicknamed "Käthchenstadt", after Heinrich von Kleist's "Das Käthchen von Heilbronn."
wine industry