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