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Recent content by crystalcai

  1. C

    My DIY Spirograph

    hi ,can you tell me how to make a difference between 200MW green laser to 5 mw ,do they has any appearance difference. How to test the power?
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    FS: 1.2 W 445nm Blue lasers

    Re: FS: 1.2 W 445nm Blue lasers (For European members) Thank you so much.I were going to buy a red laser,but now I'll buy the green one. Can you tell me the difference between green lasers and red lasers ?
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    FS: 1.2 W 445nm Blue lasers

    Re: FS: 1.2 W 445nm Blue lasers (For European members) hi,my friend is a driving coach ,he wants to buy a laser to use at night which will be useful to tell the students to see which point in the night ,which power should he buy ,and which color is beter ?I hope someone can give me some suggestions
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