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
ADHESIVES FOR PLASTICS
Almost accidentally I "turned" the glue that sticks together good parts from plastics, for example polystyrene. To obtain the necessary glue small pieces of plastic or polystyrene to...
TRAIN ON THE TABLE
A train consisting of a locomotive with a tender car, napep-ing tanks and trucks built in the circle of railway modelling road station of young technicians of the North-Caucasian...
