Cu ball

Cu ball

  • CN 104,994,974 A
  • Filed: 01/11/2013
  • Published: 10/21/2015
  • Est. Priority Date: 01/11/2013
  • Status: Active Application
First Claim
Patent Images

1. a copper ball, is characterized in that, its purity is less than 99.995%, brightness is more than 55.

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