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.
Recommend to read
THE SECOND “LIFE” OF BEACON
Flashing beacons are used in electronic home security systems and in cars as devices of indication, alarm and warning. Moreover, their appearance and "stuffing" are often not...
UNIVERSAL BATTERY
At work and in everyday life there is often a need in galvanic power source with a stepped gradation of the EMF (including the symmetric polar voltage). Often this "standard" range:...
