«ናኖ ቴክኖሎጂ»To play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoTekle Yewhala4 የካቲት 2007ረቡዕ፣ የካቲት 4 2007https://p.dw.com/p/1EZl7ማስታወቂያ