<http://webisa.webdatacommons.org/327959053>	<http://www.w3.org/ns/prov#value>	"Oxygen diffusion hardening according to this process requires the supply of oxygen, or an oxygen containing atmosphere, or compounds partially composed of oxygen, such as water (steam), carbon dioxide, nitrogen dioxide, sulfur dioxide, and the like." .
<http://webisa.webdatacommons.org/327959053>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/479718009>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/327959053> .
<http://webisa.webdatacommons.org/prov/161668501>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/327959053> .
<http://webisa.webdatacommons.org/327959053>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.co.uk> .