For the owners of the garden or suburban areas it is possible to make usual dural or steel pipe. Shown in figure “a digger” will come in handy for digging deep and narrow trenches during laying of water supply lines, and digging irrigation or drainage channels.
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LIGHTER, DARKER
Smoothly change the brightness of room lighting or hall comfortable with the thyristor voltage regulator (see Fig.). The scheme allows you to adjust the load voltage ranging from 220 V...
MILL IN MINIATURE
The proposed mini-mill was made a few years ago, eighth-grader Edward Sarkisov in the circle of technical creativity in school No. 17 in the city of Vladikavkaz. It is designed for...
