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
DOUBLE KIT
Submarine kit built by St. Petersburg-Mikhail Puchkov. The double submarine (captain and passenger). Length - 5400 mm, width 1150 mm, height - 1300 mm, sediment - 660 mm, weight - 3 tons...
QUIET EAST ON THE SLY…
When February 10, 1904 Japan officially declared war on Russia, first shots have already sounded: the Russian ships were suddenly attacked at Port Arthur and Chemulpo neutral. Initial...
