Synonyme wurden verwendet für:
Bergbau
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keywords:(Bergbau)
State provisions for location of lode claims
Comparison of horse and benzine-locomotive haulage
South African rope and safety-catch commission
The introduction of automobiles for mining work
The steam tractor hauling ore in Washington
Mule-back transportation of sectionalized machinery
Mineral resources on Kansas City, Mexico and Orient railway
Magmatic segregation in its relation to the genesis of certain ore-bodies
Investigation of open pit transportation control by means of computers
Increase in cost of transport of ores and metals
Increase in cost of transport of ores and metals