Ebe Ngwọta

Anyị nwere a zuru set nke ịnweta nhazi nnyocha, flotation reagents mmepụta osisi, nwere ọtụtụ elu larịị nke ọkachamara na oru pesonel.Isi azụmahịa anyị gụnyere: Teknụzụ nhazi mineral