If inside an ordinary Popova brush glue flush with the bristle plate of hard rubber, it can not only sweep, but wash the floor: remember car wiper, where the rubber brush dry wipe the windshield of the cab.
Recommend to read
IT ALL STARTED WITH GLIDER
In 1921 pyatnadcatiletnij student Alexander Yakovlev read a book on the history of technology. In one of the chapters talked about the emergence of aviation, there was a model...
A SMALL WINCH IS OF GREAT INTEREST
In the footsteps of virtually every information, published under the heading "ENEA — young innovator", the editor receives many letters. On the envelope address NTTM, young innovators,...
