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مواد
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مواد جديدة
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مواد جديدة
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BROADER CONCEPT
مواد
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مواد بلاستيكية
BELONGS TO GROUP
سياسة وقانون واقتصاد
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مواد ومنتجات
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http://vocabularies.unesco.org/thesaurus/concept13838
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Last modified 12/15/19