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</pre>
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== References ==
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* https://en.wikipedia.org/wiki/Food_safe_symbol
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* https://en.wikipedia.org/wiki/Japanese_recycling_symbols
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* https://en.wikipedia.org/wiki/Resin_identification_code
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* https://en.wikipedia.org/wiki/Recycling_codes
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* https://de.wikipedia.org/wiki/Produktkennzeichnung
 

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