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
“VALGA-KOMBI” — A CAR MADE OF PLYWOOD
Autocostruzione — a long-standing passion of Krasnoyarsk Vladimir Alexandrovich Hassan. The readers interested in self-made machines, will probably remember and "Mini-Valga", and...
SATCHEL — NOT A FOREIGNER
Some just "containers" for books not used by students going to school, from stylish backpacks and briefcases to canvas bags, and plastic bags. But if high school students is allowed...
