Пентагрид__

This website, titled "Пентагрид__," is associated with the term "pentagrid," which is a type of penta-electrode structure, possibly referring to a five-electrode vacuum tube or lamp. The exact nature and function of this website, however, remain unclear due to the absence of a company description. Wikipedia provides some context, suggesting that "pentagrid" might be a variation of the term "heptod," which is a seven-electrode vacuum tube. The Wikipedia page, dated August 10, 2007, provides a saved copy and links to further sources.