original Patent - E. Stauber , Hamburg , 1891 , Verkokungsofen | Koks , Kohle , Ofen , Öfen , Ofenbauer , Brennstoffe

Original Patent - E. Stauber , Hamburg , 1891 , Verkokungsofen | Koks , Kohle , Ofen , Öfen , Ofenbauer , Brennstoffe - Historical Documents
Original Patent - E. Stauber , Hamburg , 1891 , Verkokungsofen | Koks , Kohle , Ofen , Öfen , Ofenbauer , Brennstoffe - Historical Documents
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