Offer a simple way to protect the blade of the axe with cover from Velocimetry. In a suitable size segment its pre-made punch two holes; the distance between them should be somewhat smaller than the width of the blade. Then from one hole to another with a pair of scissors an incision is made and the case is ready: convenient to store and safe to carry in purse or backpack.
N. ALIKIN, St. P etersburg
Recommend to read
UNIVERSAL INDICATOR
Two LEDs with different color (e.g., red and green), you can build a simple indicator for voltages from 4.5 to 220 V. It is also able to determine the polarity of the source in the range...
AMERICAN PLANE WITH A GERMAN WING
Strategic bomber b-47 STRATOGET. Work in the field of creation of jet engines suitable for use on aircraft, began in the USA in 1941. The design of new power plants engaged in the...