Science and Technology · History of Science
स्लाइड पैमाना (Slide Rule) का आविष्कार किस देश में हुआ था?
- 1इटली
- 2जर्मनी
- 3ब्रिटेन✓
- 4फ्रांस
सही उत्तर देखें
ब्रिटेन
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