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
WINGED JEEP
The passenger plane the Yak-12. For many worldwide known aircraft designers and their teams, the road to big aviation began with the creation of a light aircraft. Often, these are the...
THE “ENDLESS” SPRING
Performing of graphic works significantly faster if you add a spring reservoir for ink. Make it from medical pipette, attach it to the handle of the instrument with metal braces. So as...
