
Look at ordinary lake that we water the flower beds or the beds in the dry season: its construction, once born, has not changed. But whether so it is perfect that does not require improvement? Of course not. Here is one of the possible upgrades. Typically, a sprinkler head is within the level of the upper handle. Of metal or rubber tubing to make the extension spacer and you instantly feel how much easier will work a “telescopic” lake: without much effort you can reach the opposite, COA the garden or greenhouse.
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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...
THE INDICATOR OF BURNING OF A FUSE
That fuse in the radio, will alert you to the simple automatic device, scheme of which was published the magazine "Radio Fernsehen Elektronik" (Germany). While a fuse F1 (see figure),...