TECHNETIUM (METALLURGY)
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BTHEAVY METALS (METALLURGY)
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UDC669.848
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Descriptor GERTECHNETIUM (METALLURGIE)
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Descriptor ENGTECHNETIUM (METALLURGY)
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Descriptor FRETECHNÉTIUM (MÉTALLURGIE)
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NTTECHNETIUM ALLOYS
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RTTECHNETIUM (CHEMICAL ELEMENTS)