كشف للذهب والمعادن: يمكن استخدام الجهاز للبحث عن جميع أنواع المعادن، بما في ذلك الذهب والفضة والحديد والنحاس. The steel detectors were first invented and made commercially in The usa by Fisher Labs within the 1930s; other businesses like Garrett recognized and designed the steel detectors regarding technologies and functions https://andre110u7.uzblog.net/the-2-minute-rule-for-اكتشاف-المعادن-46447842