P O http://iconclass.org/47G6%28PLUMB-LINE%29%28%2B14%29

tools and machines ~ building: plumb-line (+ on the water)

TTL NT
S P O skos:broader
S P O http://iconclass.org/47G6%28PLUMB-LINE%29%28%2B1%29
S P O skos:prefLabel
S P O tools and machines ~ building: plumb-line (+ on the water)