A simple device for carrying a wide sheet materials are easy to make yourself, having at hand two, tee, four corners and three or four water pipe section.
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ELECTRONIC “MIRACLE”
You enter the room, and suddenly light flashes, "alive" is a radio or a tape recorder. To make such a "miracle" the strength of the capacitive relay (the diagram in the figure). ...
SKI BRAKE
When descending on alpine skis, as soon as the transverse or longitudinal load exceeds the set value, the binding automatically releases, freeing the foot from the ski. The detached ski...
