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KOHLENBERGBAU LEITUNG DEUTSCHE
Original Assignee
KOHLENBERGBAU LEITUNG DEUTSCHE
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Application filed by KOHLENBERGBAU LEITUNG DEUTSCHEfiledCriticalKOHLENBERGBAU LEITUNG DEUTSCHE
Application grantedgrantedCritical
Publication of FR1056219ApublicationCriticalpatent/FR1056219A/fr
E21C39/00—Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
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Engineering & Computer Science
(AREA)
Mining & Mineral Resources
(AREA)
Life Sciences & Earth Sciences
(AREA)
General Life Sciences & Earth Sciences
(AREA)
Geochemistry & Mineralogy
(AREA)
Geology
(AREA)
FR1056219D1951-01-181952-01-16Procédé pour mesurer la dureté du charbon et appareil pour l'exécution de ce procédé
ExpiredFR1056219A
(fr)