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
GRINDING THE SEEDS? PLEASE!
Becoming a farmer, I was faced with the necessity of grinding of beet seeds and alfalfa. Asked how to cope with this problem experienced large farms, and that is, on the image made a...
ELLIPSOGRAPH
ELLIPSOGRAPH — is the name of this simple device. It can be used to draw an ellipse with any ratio of the semiaxes. It is enough to set into the holes on the line of alignment pins to...
