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US1782423A
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|
Conveyer
|
|
US1786999A
|
|
Reduction of metals from ores
|
|
ES107053A1
|
|
A procedure to benefit iron ores and their analogues.
|
|
US1742487A
|
|
Method of manufacturing steel
|
|
ES106077A1
|
|
A steel manufacturing process.
|
|
ES103706A1
|
|
Improvements in equipment to reduce iron ore to the state of metallic iron without melting it.
|
|
ES103696A1
|
|
A procedure for the reduction of iron ore and other minerals.
|
|
ES103048A1
|
|
A steel manufacturing process.
|
|
ES102364A1
|
|
An improved process for the treatment of iron ores and their analogues.
|
|
ES102193A1
|
|
Improvements in the manufacture of steel for rails.
|
|
ES102194A1
|
|
A procedure for the manufacture of steel.
|
|
GB298118A
|
|
Improvements in or relating to rail steels
|
|
US1751736A
|
|
Apparatus for reducing oxides of metals
|
|
US1690820A
|
|
Reduction of metals from ores
|
|
US1774189A
|
|
Rail steel
|
|
US1651638A
|
|
Process of making steel
|
|
US1841602A
|
|
Treatment of iron ores and the like
|
|
US1606124A
|
|
Rotary-kiln apparatus
|
|
US1606125A
|
|
Treating cement mix and other materials
|
|
CA298435A
|
|
Process of making steel
|
