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
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TEST QUARTZ
allows you to quickly verify the health of the quartz resonators. Diagram of the device consists of a generator (T1), detector (D1, D2) and DC amplifier (T2). By connecting the quartz to...
AND TAKE OFF YOUR SHOES AND PUMP UP
Remove the boots helps convenient device, which is a plate under the heel of the Shoe. To protect the heel from damage, sharp edges of the recesses should be rounded, sanded, and even...