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• 
  @user-hy9vl1kr2iАй бұрын

  Hello sir I want to ask you something

• 
  @user-taleb.alarefi Жыл бұрын

  Please help me, I am a jeweler and I need this technique to arrange a surface for gold

• 
  @dogodogo58912 жыл бұрын

  is there any book or relevant topic about metamaterial for beginner? i'd rather difficult to find one