RE: Laser Technology: Understand How your DVD/CD Players, Laser printers, Holography and Bar-code Scanners works

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greenrun (66)in #steemstem • 7 years ago

Detailed. Informative. Wow

7 years ago in #steemstem by greenrun (66)

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tormiwah (57) 7 years ago

Thanks bro. Following your steps

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greenrun (66) 7 years ago

Good job

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