About: http://webisa.webdatacommons.org/228676233

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	By ensuring that the centers of the gratings M2 and M1 remain visible on the TV monitor the operator can adjust the mask in the X and Y direction with an accuracy up to for example 100 ??m.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es