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<http://webisa.webdatacommons.org/48272733>	<http://www.w3.org/ns/prov#value>	"Vacuum traps and vacuum filters are used to remove tramp gases with a cooled surface, molecular sieve, filtration, or other processes." .
<http://webisa.webdatacommons.org/prov/220535281>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/48272733> .
<http://webisa.webdatacommons.org/48272733>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<globalspec.com> .