If, during the filling of high capacity water (e.g. drums) intended for watering the garden, throwing a rubber ball of small size, its appearance over the edge of prompts to close the valve. Thereby eliminating the need for constant monitoring of the level of a cursory glance.
N. SVIRIDENKO, p. Pervomayskiy, Kazakhstan
Recommend to read
SUPERPOLITIK JUNIORS
Attempts to use the competitions to openly simplified educational technology in the classroom cord aerobatic models, naturally, can not give good results even when well developed the...
PIPE? We will CUT!
Cut the pipe threads have not only a plumber. Many people today are forced to learn the profession of home wizard. But in each case there are certain difficulties, to overcome which...
