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Economic Geology / Metals / Industries / Mining / Technology
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Aluminium / Welding / Electric Current / Metals / Iron
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Welding / Aluminium / Steel / Electric Current / Metals
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Steel / Quality (Business) / Design / Metals / Bridge
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Corrosion / Electrochemistry / Metals / Materials Science / Chemical Substances
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Gear / Pipe (Fluid Conveyance) / Elevator / Welding / Metals
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Brake / Metals / Scrap / Recycling / Steel
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Aluminium / Building Materials / Manmade Materials / Metals / Industries
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Welding / Chemical Substances / Metals / Materials / Industries
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Corrosion / Ph / Metals / Iron / Sodium Chloride
Clase 4 Procesos de Mineralización
Solubility / Gold / Coordination Complex / Metals / Ion
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Zinc / Brass / Mining / Copper / Metals
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Zinc / Mining / Peru / Exports / Metals
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Gases / Metals / Chemical Bond / Ceramics / Carbon
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Welding / Nondestructive Testing / Strength Of Materials / Metals / Industries