青奉李

Automatic medicine supplying machine

刘勇, 史明白, 谢会勇, 2015 .

Mobile plasma air purification sterilizer

刘勇, 文海龙, 汪洋, 2014 .

Filter being suitable for air purifying and disinfecting machine

刘勇, 徐鸿, 汪洋, 2013 .