About: http://webisa.webdatacommons.org/139355065

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	ring system that can confirm a position of a moving object including a person in a complicated pit in order to early discover a trouble or a problem occurring in the pit. [MEANS FOR SOLVING...
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com