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Instructables

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  How to Remove the Copper Layer of a Penny

  5 3.4K
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  Extract Your Own Dna From Blood

  24 2.5K
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  Make Red Litmus Paper

  2 2.3K
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  How to Make Sodium Hydroxide

  57 139K
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  LM317 Adjustable Voltage Regulator

  26 11K