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Mining production iron steel from hematite and magnetite mining production iron steel from hematite and magnetite it almost always consists of iron oxides the primary forms of which are magnetite fe3o4 and hematite fe2o3iron ore is the raw material.
Williamson 1971 williamson 1979 distinguished complete from incomplete contracts a complete contract can be written for a process whose outcome is well-defined and thus there is little or no need for internal control in mining an example would be a.