كره ارضيه ، أرض ، كرة ، خطوط ، موجة ، دائرة ، إرسال ، وردت في ، موجات الدوائر ، الاهتزازات ، الاتصالات
Public Domain
علامات الصورة:
الصور ذات الصلة الخالية من حقوق الملكية
- Public Domain
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