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| [[Category:Chimie]] | | [[Category:Chimie]] |
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− | <youtube>qvfh0bfK9DQ</youtube> | + | <youtube width="320" height="193">qvfh0bfK9DQ</youtube> |
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| =Concept= | | =Concept= |
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− | <youtube>https://youtu.be/fdk6QJ0HKJE</youtube> | + | <youtube width="320" height="193">https://youtu.be/fdk6QJ0HKJE</youtube> |