Assertion: tellurium | /r/AtLocation | copper
Facets:
value: to improve machinability
type: PURPOSE
value: usually
type: TEMPORAL
Source sentences:
text: Tellurium is usually added to copper to improve machinability ("free cutting").
text: In addition, it is used as an oxidizer and colorant and is added to stainless steel and copper.
text: Tellurium is also added to copper to improve machinability.
text: Tellurium is combined to lead to increase its resistance to sulfuric acid and added to stainless steel and copper to make easier to machine and mill.
text: When added to stainless steel and copper it makes those the resultant alloy more machinable.