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Inventions लेबल वाली पोस्ट दिखाई जा रही हैंसभी दिखाएं
Invention Of  Sewing & Embroidery Machines । सिलाई मशीन
 Invention of electricity in Hindi
 Pencil  in Hindi पेन्सिल
CCTV CAMERA Full form । CCTV camera in hindi
Invention Of BULB । बल्ब का अविष्कार