Shovels, hoes, axes — any cutting tool before sharpening, it is useful to hold at least an hour in a weak solution of
salt and, without wiping, start sharpening metal will be easier to sharpening.
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THERMOSTAT
This device is not very complicated and consists of the heating element, the mercury column and the solenoid. When the current is switched on starts to operate the heater — closed...
UNIVERSAL LEVEL
It is arranged simply: two glass tubes with a length of about 100 mm, diameter of inner hole at least 10 mm, and two lines of hose with a length of about 600 mm each. Connect it all as...
