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
FROM AN AUTOMOBILE – TRUCK
Increased interest motorists to cargo trailers is quite understandable. Still, the device is able of the car, indispensable for any economy, and primarily to rural residents and...
GRAVITY INSTEAD OF SPRINGS
The door in the form of a trapezoid - not architectural elements and a simple and elegant solution to the problem of automatic closing doors that do not require a single additional...
