Method and apparatus for scanning and monitoring the roof of seams mined by cutting machines
United States Patent 3371964

Inventors:
Karl-heinz, Weber
Publication Date:
03/05/1968
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Assignee:
Eickhoff, Maschf Eisen
Primary Class:
Other Classes:
299/43
International Classes:
E21C27/02; E21C35/04; E21C35/10; E21C35/24; E21C27/00; E21C35/00
Foreign References:
GB966714A