दर्शक, सभागार, सम्मेलन, प्रतिस्पर्धा, भाषण, माइक्रोफ़ोन, प्रस्तुतीकरण, मंच, प्रदर्शन स्थान, सेमिनार, घर के अंदर
Public Domain
प्रासंगिक तस्वीरें
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