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
CADILLAC V16 1930
The first American car company Cadillac, founded in 1902, was a machine, practically do not differ from those produced workshops of Henry Ford. However, since 1909 the company went into...
CARTRIDGE-GUN ARKHANGELSK
Vocational school graduates, finishing school, to protect diploma. They are often self-development: engineering and manufacturing of complex parts, assemblies, or fixtures....
