Assertion: osmium's alloy | /r/HasProperty | employed in fountain pen nibs
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Source sentences:
text: Its alloys with platinum, iridium , and other platinum-group metals are employed in fountain pen nibs , electrical contacts , and other applications where extreme durability and hardness are needed.
text: Its alloys with platinum, iridium and other platinum group metals are employed in fountain pen nibs, electrical contacts, and other applications.