Iche iche na ngwaahịa nke ntụ ntụ Metal Detector, na-enye ngwaahịa oyiyi na isi kwa na onye ọ bụla Powder Metal Detector na Pipe Metal Detector N'ihi Powder; Anyị bụ ndị a ọkachamara Chinese emeputa nke ntụ ntụ Metal Detector, na-atụ anya gị imekọ ihe ọnụ!

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