
In construction you often have to deal with the internal measurements. For example, to determine the distance between the form panels, the value of the window or doorway. A good assistant in such cases would be sliding ruler, made of tube and metal rod with applied risk.
V. ANTIPIN
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A simple feeder for small birds can be done literally in minutes, using a tin can and a stick of wood or a suitable diameter of the branch.
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"E-match" is the name of the material on electroscience, published in No. 3 of the journal "modelist-Konstruktor", 1999. The development will be able to find its rightful place in the...