About: http://webisa.webdatacommons.org/449786802

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	DC welding current also can be pulsed to control penetration with both melt-in mode and keyhole mode.Variable polarity plasma arc (VPPA) welding power sources enhance the joining of materials such as aluminum and magnesium.
http://www.w3.org/ns/prov#wasQuotedFrom	thefabricator.com