To eliminate the need to carry a ruler or tape measure, apply a linear division on the comb, which is always in my pocket.
N. TURULIN, Taganrog
Recommend to read
THE THERMOSTAT-THE CELLAR
Five years ago one of my friends purchased a garage with a cellar and worried about how and what to do to potatoes and other vegetables, planted for winter storage in the cellar, didn't...
LAMP… FOR A QUARTER OF AN HOUR
The two elements 373, light bulb 3,5ВХ0,26A, a strip of sheet brass with a thickness of 0.5 mm (150x5 mm), cut cardboard (150X X200 mm), cotton thread, glue, a soldering iron and...