Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Anomalous wear of bits equipped with fine diamonds
Formation of circular channels in face of bit is due to wear by rock fragments 2 to 4 mm in diam; better results were obtained when circulation was reversed; this resulted in penetrations of 20 to 25 m between recoveries of core.
Anomalous wear of bits equipped with fine diamonds
Formation of circular channels in face of bit is due to wear by rock fragments 2 to 4 mm in diam; better results were obtained when circulation was reversed; this resulted in penetrations of 20 to 25 m between recoveries of core.
Anomalous wear of bits equipped with fine diamonds
Ob anomal'nom iznose melkoalmaznykh koronok
Tolkachev, G.M. (Autor:in)
1963
2 pages
Aufsatz (Zeitschrift)
Russisch
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