Now, many medicinal tablets are Packed in colorful plastic cells, covered with foil or paper. In improvised signal light devices are very convenient to use such cells as the cap-filter for signal lamps.
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RING FROM THE BATTERY
In homes today, it is used quite a lot of galvanic power sources (batteries). Even the most "long-playing"-of them at the end of life just thrown away, though their metal body remains as...
PRECISION 0.1 — WITHOUT A MICROMETER AND VERNIER CALIPER
Measure the bore diameter or roller to determine the size of the gap with an accuracy of 0.1 mm it is possible not only with the help of micrometer, Vernier caliper or feeler gauge. Each...
