About: http://webisa.webdatacommons.org/356246392

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	Preferably, the reducing agent is a gas and constitutes about 4 volume percent (vol. %) or less of the reducing gas, or about 2 vol. % or less.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com