
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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The unusual design of bearing areas — that is the main distinguishing feature of the proposed model glider. Their advantage in ease of manufacture. The absence of cut from the sheet...