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winkler

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magnetic necklace pendant
... Number: 32Atomic Mass: 72.59 g.mol -1Discovered By: Clemens Winkler 1886Germanium will likely become a significant trace mineral because of ...
  • China
  • ADD:Unit02 A 7/F,Beihuan Business Building,Beihuan Road Gongming Town,Shenzhen,Guangdong
  • TEL:0086-755-27109977
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