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Bergbau
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keywords:(Bergbau)
Study of Design and Development of a Coal Injector for Coarse Slurry Transport
Use of Outer Planet Satellites and Asteroids as Sources of Raw Materials for Life Support Systems
Review of Recent Accidents Involving Explosives Transport
Potential Applications of Advanced Aircraft in Developing Countries
History of United States of America Assistance to Chile. A.I.D. and Predecessor Agencies 1943-1980