News for: invention

Vietnam joins Seoul International Invention Fair 2018

12/07/2018 17:59

VTV.vn - Seoul International Invention Fair 2018 officially opened yesterday at the Seoul Convention & Exhibition Centre.

Tags: invention, technology

09/21/2016 10:31

VTV.vn - For many teachers, chalk dust is an inevitable part of their daily work, which is quite uncomfortable and can cause health problems.

Tags: chalkboard, machine, invention

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