道依茨
The Maschinenbauanstalt Humboldt was a German mechanical engineering firm in Cologne-Kalk and a precursor to the firm of Deutz AG. It was founded in 1871 as "Maschinenbau A.G. Humboldt", liquidated due to debts in 1884 and reformed as "Maschinenbauanstalt Humboldt A.G.".