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
“KARLSON” ON THE ROOF
On the ridge of the roof of the house I made a weather vane Carlson. The design is very simple to manufacture. The "Carlson" produced from a metal sheet thickness of 2 mm. the Figure and...
FOR THE TABLE
If you are caught in the woods or on the river Bank or a branch broken off a bough, at which time the core is turned into dust, but the outer layers still strong — saw the discovery of a...
