New device that uses air to wash hands developed in China
A group of seven Chinese students has bagged a top international prize for inventing a machine that uses air for cleaning hands and saves water.
Sep 18, 2015, 18:43 PM IST
A group of seven Chinese students has bagged a top international prize for inventing a machine that uses air for cleaning hands and saves water.
Sep 18, 2015, 18:43 PM IST