
A simple “opener” for metal cans with lacquer or varnish can be done in just a minute from block of wood and two nails.
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Electronic thermometer
This device can quickly and accurately measure, for example, the temperature of a human body, water, and air. An electronic thermometer is needed by agricultural workers to determine the...
THE COMPOSTING GREENHOUSE
For the rational use of weeds and grass-tops in gardens or allotments of their composted in pits or small towers. I'm doing this: throwing a wooden greenhouse in a box without a bottom...