
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
CONCRETE… WITH SPIRAL
Every individual developer strives to ease the heavy physical labor involved in various construction tasks by mechanizing them whenever possible. However, as often happens, there is no...
REINCARNATION (su-7 to su-7БКЛ)
During the Second world war in the West, fighters, modified to destroy ground targets, became known as fighter-bombers. After the war they were further developed. This contributed to a...