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The development of face production : [summary of lecture]
Vogel, Walter - 1947
Persistent link: https://www.econbiz.de/10001534431
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Safety protection for coal face lighting circuits
Grummer, A. - 1947
Persistent link: https://www.econbiz.de/10001534432
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The introduction and development of plough loaders in the Ruhr
Lange, Fritz - 1947
Persistent link: https://www.econbiz.de/10001534437
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Modern machines for coal extraction
Lange, Fritz - 1947
Persistent link: https://www.econbiz.de/10001534439
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Modern practices in the driving of stone mines
Benthaus, Fritz - 1947
Persistent link: https://www.econbiz.de/10001534441
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A rotary rock tunnelling machine
Vogel, W. - 1947
Persistent link: https://www.econbiz.de/10001534444
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A new type of main road battery locomotive
Weddige, A. - 1947
Persistent link: https://www.econbiz.de/10001534448
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Comparison of locomotive costs
Koch, Heinrich - 1947
Persistent link: https://www.econbiz.de/10001534450
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Economic comparisons between the various types of underground locomotives
Koch, Heinrich - 1947
Persistent link: https://www.econbiz.de/10001534452
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Standardisation of pit tubs
Schlobach, Erich - 1947
Persistent link: https://www.econbiz.de/10001534454