Detail
Type Ml. - Niddermühle is a Mühle (Mill).
Kr Friedberg - The Kreis for Niddermühle is Friedberg. A Kreis is a government district (similar to a U.S. county).
See Heldenbergen - A See notation means the entry is dependent on another entry. In this case, Niddermühle is dependent on Heldenbergen, which should be consulted for additional information.