Inventing an automatic disinfectant sprayer for the prevention of Covid-19
Sao Do University (Hai Duong province) has successfully researched and manufactured a system of automatic disinfection sprayers for road motor vehicles, serving the prevention andGrade 9 students invented an automatic disinfectant spray machine, priced at VND 350,000
Just put your hand in, the machine will automatically spray disinfectant within 2 seconds without having to press the button like a regular antiseptic, limiting