Russian Federation : JSC "VNIPIPromtechnologii" has started a preliminary analysis of works on design of the northernmost Russian mining enterprise for extraction and ...
Get this from a library! Mining and treatment of lead and zinc ores in the Joplin district, Missouri : a preliminary report. [Clarence A Wright]
Preliminary flotation tests with the ore sample ... The following conclusions were made as a result of this experimental study carried on oxide lead–zinc ore:
Vedanta Resources plc Preliminary Results for the Year Ended 31 March 2016 ... copper, zinc, lead, silver, iron ore, oil gas and commercial energy.