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
THE CORRUGATED BOARD MOTOR
Not so long ago in the journal "modelist-Konstruktor" was about the simplest model of a glider made from a conventional packaging corrugated Board material although not aeromodelling,...
THE “DRY” BOILING
Not too pleased to be in the kitchen when there came out from under cover lingerie tank steam raises humidity and temperature of the air so often that it's hard to breathe. To get rid of...
