About: http://webisa.webdatacommons.org/15229421

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	The arrows are an indication that you have selected the correct marker pulse, not an indication of the correct zero position, that has already been set by the grid shift.
http://www.w3.org/ns/prov#wasQuotedFrom	cnc-professional-forum.com