hola quisiera ayuda con este titulo es sobre mineria:
typical cut grade
gold is generally extracted in open cut mine at 1 to 2 ppm (grams per ton) but in certain cases ,0,75ppm gold is economic.
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hola quisiera ayuda con este titulo es sobre mineria:
typical cut grade
gold is generally extracted in open cut mine at 1 to 2 ppm (grams per ton) but in certain cases ,0,75ppm gold is economic.