The smart Trick of كاشف المعادن والذهب That Nobody is Discussing
وضع العملات: يستخدم للبحث عن العملات المعدنية في التربة أو على سطح الأرض.The first metal detector was probably The easy electrical conduction metallic detector ca. 1830.[41] Electric powered conduction was also utilized to Track down metallic ore bodies by measuring the conductivity among m