Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Report of 60 companies to questionnaires sent them by Underground Drilling Committee of American Mining Congress; factors determining selection of rocks drills; variations in use of drill steel; testing of bits.
Report of 60 companies to questionnaires sent them by Underground Drilling Committee of American Mining Congress; factors determining selection of rocks drills; variations in use of drill steel; testing of bits.
Underground drilling practices
Min Congress J
Stewart, R.M. (Autor:in)
1959
Aufsatz (Zeitschrift)
Englisch
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