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jhair luna

vendo coltan

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hola buenas noches tengo un mineral a la venta , arenas negras mineral que es muy buscado estoy en colombia  me pueden contactar

tengo  ficha tecnica 

examen de mineral directo 33% 

oxido 56% y en oxido de tantalio y niobio

4.8% NB

16% en oxido de niobio


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