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Describes methods of timbering heavy mines, methods of taking the measures for timbers underground, etc. (2000 w.) (No. 76983)
Describes methods of timbering heavy mines, methods of taking the measures for timbers underground, etc. (2000 w.) (No. 76983)
Underground timbering
Min Sci Pr
Nickerson, R.B. (Autor:in)
1906
Aufsatz (Zeitschrift)
Englisch
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Timbering underground workings
Engineering Index Backfile | 1899
|Timbering and supporting underground workings
Engineering Index Backfile | 1898
|