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Electrically driven diamond drill
An illustrated description of the Fromholt electric drill for mining, quarrying and tunnelling. (1200 w.)
Electrically driven diamond drill
An illustrated description of the Fromholt electric drill for mining, quarrying and tunnelling. (1200 w.)
Electrically driven diamond drill
Perforatrice a Diamauts et a Commande Electrique
1901
Aufsatz (Zeitschrift)
Französisch
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Engineering Index Backfile | 1957
|Development of diamond drill bit
Engineering Index Backfile | 1959
|The diamond drill and its methods
Engineering Index Backfile | 1926
|Engineering Index Backfile | 1901
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