سلسلة كتلة ، شخصي ، تصافح بالايدي ، مصافحة ، البيانات ، السجلات ، مفهوم ، النظام ، الاتصالات ، إجماع ، آلية
الصور ذات الصلة الخالية من حقوق الملكية
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