صوت مرئي ، أمواج ، الدوائر ، صوت ، موجات صوتية ، تموج ، سائل ، ضوء ، الاهتزازات ، وهم ، موجة
Public Domain
علامات الصورة:
الصور ذات الصلة الخالية من حقوق الملكية
- Public Domain
- Public Domain
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