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
CHINESE SYNTHESIZER
In selling there are a number of relatively inexpensive electronic musical instruments (EMI) of Chinese origin that fall within the price category of a toy. However, inherent in their...
Kart racer’s desk
Many youth technical clubs and stations (КЮТ and СЮТ) have karting sections. The small machine not only helps kids learn the general concept of how a car works and master the basics of...
