Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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UNTERNEHMUNGEN DER EISENUND ST
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UNTERNEHMUNGEN DER EISENUND ST
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Publication date
Application filed by UNTERNEHMUNGEN DER EISENUND STfiledCriticalUNTERNEHMUNGEN DER EISENUND ST
Publication of GB746986ApublicationCriticalpatent/GB746986A/en
Improvements in or relating to method of and means for lining or walling hollow spaces in the earth, such as workings, shafts, tunnels, more particularly in connection with mining