The phrase appears to refer to the 12th issue of the Ukrainian crossword or entertainment magazine "Objora" (also known as «Обжора» ), specifically the 280th total edition published in 2014.
Objora (The Glutton) is a popular series of puzzle and crossword magazines. Download File В«ObjoraВ»_12(280) 2014.pdf
While this specific file is often found on document-sharing and archival sites, it is generally a collection of scan-based entertainment content rather than an academic or technical paper. Context of the File The phrase appears to refer to the 12th
Typically includes crosswords, scanwords, puzzles, and light humorous articles. Download File В«ObjoraВ»_12(280) 2014.pdf
It is important to note that search results for "12.4.280-2014" often lead to , a Russian technical standard for occupational safety clothing . If your interest is in safety standards rather than a crossword magazine, you can find the full text of that technical document on professional databases like Stroyinf .
The .pdf designation indicates a digital scan of the physical printed magazine from December 2014. Confusion with GOST Standards