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וויליאם קמקוומבה על בניית טחנת רוח
3,930,714 views |
William Kamkwamba |
TEDGlobal 2007
• June 2007
Read transcript
כשהיה בן 14, הממציא ממלווי וויליאם קמקוומבה בנה למשפחתו טחנת רוח המספקת חשמל מחלקי חילוף ותוכניות טיוטה שמצא בספריה.
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