Based on the search results provided, there is no direct, singular match for "feature: 171 (PrГ©-Alfa)" as a specific software, game, or technological feature.
However, based on the text snippets, here are the most relevant potential interpretations related to "171" and "Alpha" from the results: 171 (PrГ©-Alfa)
Is this , a piece of hardware , or a medical report ? Based on the search results provided, there is