दर्शक, सभागार, सम्मेलन, प्रतिस्पर्धा, भाषण, सेमिनार, प्रस्तुतीकरण, माइक्रोफ़ोन, सम्मलेन केंद्र, कुरसी, घर के अंदर
Public Domain
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Public Domain
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