<http://webisa.webdatacommons.org/222873693>	<http://www.w3.org/ns/prov#value>	"Vacuum deposited Cr improves adhesion of the solder onto the PCB. Hence, tin-lead solders often contain other metals such as Cu, Ni, Cr, and Ag." .
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<http://webisa.webdatacommons.org/prov/465245870>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/222873693> .
<http://webisa.webdatacommons.org/222873693>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .