Science · Inventions
निम्नलिखित में से कौन सा थॉमस अल्वा एडिसन के आविष्कारों में शामिल नहीं है?
- 1एयर कंडीशनिंग सिस्टम✓
- 2फोनोग्राफ
- 3बिजली का बल्ब
- 4टेसीमीटर
सही उत्तर देखें
एयर कंडीशनिंग सिस्टम
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