5 Essential Elements For اكتشاف المعادن
ملاحظة: المعلومات والتوضيحات أعلاه هي بيانات الشركة المصنعة.The first metallic detector was very likely The easy electric conduction steel detector ca. 1830.[41] Electrical conduction was also utilized to Identify steel ore bodies by measuring the conductivity in between metallic rods driven into t