ابتكارات في استخراج تعدين النحاس
تقنيات استخلاص النحاس
التاريخ [تحرير | عدل المصدر]. The earliest evidence of coldhammering of native copper comes from the excavation at Çaÿonü Tepesi in eastern Anatolia. The radiocarbon date is 7250 ± 250 BCE. Among the various items considered to be votive or amulets there was one that looked like a fishhook and one like an awl....