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Everything about جهاز كاشف المعادن والذهب

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أفضل أجهزة كشف الذهب من جراند ديتيكتورز – التكنولوجيا والدقة في التنقيب The 1st metal detector was probably the simple electric powered conduction metallic detector ca. 1830.[41] Electric powered conduction was also used to Track down metallic ore bodies by measuring the conductivity among metallic rods pushed into the ground. https://ricardo012l5.csublogs.com/39314902/a-review-of-جهاز-كشف-المعادن

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