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Recent content by weiwei

  1. W

    does this is too powerful?

    for astronomy and he is 16 years old, he already buy the safety glasses,this shop selle safety glasses,too,and he told me do not worry about him, but I still worry about it so I'm here for your answer
  2. W

    does this is too powerful?

    my son buy a laser point in a online shop laser acheter, but he choose the 200mw ,in my opinion, I think this is too powerful and it's dangerious! is there a laser expert can answer my question?
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