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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Sometimes when lifting particularly heavy items are scrap or Kyle. And yet arm is clearly not enough. Growths the tool with a piece of ordinary water pipe, as shown in the figure.
