"Láng Machine Factory (Hungarian Láng Gépgyár) was a machine factory in Hungary that played an important role in supplying Hungarian power plants and factories with steam engines, turbines and diesel motors.
Founded in 1868 by László Láng as a machine repair workshop, the company started producing steam engines in 1873 and became the largest manufacturer of steam engines for factories and ships by the 1890s. The generators providing electric power to the Millenium Underground Railway were powered by Láng steam engines. The company also made equipment for the distilling, sugar, and canning industries. " - (en.wikipedia.org 11.08.2021)
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