About: http://webisa.webdatacommons.org/362361046

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	This problem may be particularly difficult when attempts are made to screen off such magnetic fields in shafts in connection with the measurement of torques.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com