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الابتكار عطاء
829,469 views |
دين كامين |
TED2002
• February 2002
Read transcript
يعرض المخترع دين كامين حُجّته من على الدراجة ، ويقدم نظرة خاطفة عن أفكاره الكبيرة المستقبليّة (الطاقة المحمولة وتنقية المياه في البلدان النامية).
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