About: http://webisa.webdatacommons.org/185366114

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	At least a section of the internal surface of the chamber lid 232, including the expanding channel 234 and the bottom surface 260, has a surface roughness (Ra ??in) preferably between about 46 Ra and 62 Ra, preferably about 54 Ra.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es