ألوان التركيز

سرّ وجود شريط الدوائر الملونة أسفل أغلفة المواد الغذائية

Keep going ألوان التركيز 21 أبريل 2017

أغلبنا يلاحظ وجود مجموعة من الدوائر أو المربعات الملونة أسفل العبوة، التي لا نفهم سرَّ وجودها، ولا نهتمُّ لأمرها كثيراً. سنوضح في هذا ا...

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