جاهز للتشغيل
جاهز للتشغيل
It has been found that some Korean papers contain a significant amount of radium-226 after more than a hundred years, raising concerns about the contamination of old materials with unexpected radiation levels.
تنويه: هذا ملخص تم إنشاؤه بواسطة الذكاء الاصطناعي
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