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Analysis of deposits; use of hand augers for drilling; system of timbering assures safety, is simple of application and is recovered.
Analysis of deposits; use of hand augers for drilling; system of timbering assures safety, is simple of application and is recovered.
Underground clay mining
Brick Clay Rec
Schuette, C.N. (Autor:in)
1929
3 pages
7 Figs.
Aufsatz (Zeitschrift)
Englisch
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Items requiring consideration in underground clay mining
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