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GB1077597A
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Columbium-hafnium base alloys with yttrium addition
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OA2019A
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Process for the benefit of ilmenite ores.
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GB1096714A
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Benefication of ilmenite
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US3337676A
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Electron beam melting apparatus
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US3311797A
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Electrolytic capacitor including heat resistant spacer containing the electrolyte and method of making same
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GB983676A
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Improvements in process for removing phosphorus and sulphur from ores containing niobium and tantalum
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US3193376A
|
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Beneficiation of ilmenite
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GB923212A
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Method of treating zirconium alloys
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US3099526A
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Recovery of earth acids from slag
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US3162943A
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Method of making wire of superconductive materials
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US2992095A
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Process of separating niobium and tantalum values in oxidic ores and of producing pure niobium
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US2893832A
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Purification of tungstates
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US2894814A
|
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Purification of tungstates
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GB823043A
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Purification of tungsten by recrystallization of normal alkali metal tungstate as the paratungstate
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CA775046A
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Beneficiation of ilmenite
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CA552462A
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Purification of alkali tungstates
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CA714496A
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Process for removing phosphorus and sulfur from ores containing columbium and tantalum
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CA696821A
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Recovery of earth acids from slag
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CA705863A
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Method of treating corrosion resistant materials
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