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Nguyen Duc Viet's user avatar
Nguyen Duc Viet's user avatar
Nguyen Duc Viet's user avatar
Nguyen Duc Viet
  • Member for 5 years, 6 months
  • Last seen more than 5 years ago
  • Hanoi, Việt Nam
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Passionate about Renewable Energy, Optics and Social problems

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