I've seen the acronym ממנ”פ in multiple places but I am not sure what it means. קיצורים וראשי תיבות בעברית indicates that it means ממערכת נשימה פנימית but I am not sure if that is correct. Here are some places when I have seen that acronym used: https://www.hebrewbooks.org/rambam.aspx?mfid=8818&...