About: http://webisa.webdatacommons.org/189378006

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	it is a standard saying around here (HVAC-Talk): Nothing belongs in a refrigeration system other than refrigerant and oil.
http://www.w3.org/ns/prov#wasQuotedFrom	hvac-talk.com