General Science · Inventions
सेफ्टी पिन का आविष्कार किस देश में हुआ था?
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- 1फ्रांस
- 2जर्मनी
- 3यू.के.
- 4यू.एस.ए. (USA)✓
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यू.एस.ए. (USA)
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