±Û ¼öÁ¤Çϱâ
±Û¾´ÀÌ
E-mail
Homepage
±ÛÁ¦¸ñ
±Û
I've got a very weak signal
student service learning essay
The potential for problems was well-known to grid operatorsbecause Cleveland-Akron had suffered severe power shortages andtransmission congestion in 1994 and 2002. Two power lines hadalready failed that afternoon, increasing pressure on the grid.
ºñ¹Ð¹øÈ£
(¼öÁ¤°ú »èÁ¦½Ã ÇÊ¿ä!! )