Duplicate copy of the 2SC4517 NPN transistor sheet, a 26.9 KB PDF filed among schematics, with the numbered suffix indicating a second saved instance rather than a new revision. It should present the same ratings, pinout and characteristics as the other copies. Bench use covers identifying leads, checking for shorted junctions, and comparing specs when hunting for an equivalent. Since the size matches the other copies it is likely identical content; any PDF viewer will open it, and the marking on the fitted transistor should be checked first.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.