Iche iche na ngwaahịa nke Gravity Nri Metal Detector, na-enye ngwaahịa oyiyi na isi kwa na onye ọ bụla nwere ikike Nri Metal Detector na Gravity Nri Metal separator; Anyị bụ ndị a ọkachamara Chinese emeputa nke Gravity Nri Metal Detector, na-atụ anya gị imekọ ihe ọnụ!