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إن رحلة الإستكشاف الحقيقية لا تستلزم الذهاب لأراض جديدة بل تستلزم الرؤية بعيون جديدة.The metallic detectors were being to start with invented and created commercially in the United States by Fisher Labs within the 1930s; other providers like Garrett set up and made the metal det