About: http://webisa.webdatacommons.org/354202035

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	However, such an instrument requires a rotating mechanism such as driven by a motor and transmission belt which may cause the drawback of heavy weight, increased production cost and maintenance problems.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es