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تاریخچه و کاربرد نایلون و نایلکس مطالعه تاریخچه و کاربردهای نایلون و نایلکس
arunrpeq694827
3 hours ago
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نایلون که اولین بار در سال 1935 توسط یک شرکت آمریکایی کشف شد. این ماده مصنوعی از ترکیبات اتانول ساخته شده و به دلیل مقاومت
https://saniplastmehr.com/
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