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
Recommend to read
PNEUMATOS WITHOUT FICTION
For transportation of large cargo by land over distances of hundreds and thousands of miles of not-yet-invented method than the railway. It accounts for in the country about two thirds...
CANDLE holder
MATERIAL: heavy-gauge wire or metal rod with a diameter of 6 mm, copper thin wire, copper or brass sheet thickness of 3 mm. TOOLS: tin snips, hacksaw, file, drill and a drill bit Ø...
