Mike Krzyzewski is really a famous coach of Dream Team. She has coached north america men's basketball team for some time, that's clinched numerous medals for his country. Following Londonfl jerseys supplyn Olympic was over, Krzyzewski told The Associated Press that this game will be his final one as national coach, a job he's held for seven years. He had left open the possibility of swomen nfl jerseystaying with the team beyond the London Games, when practice on Saturday said these will be his last Olympics.When asked if he was sure, Krzyzewski didn't hesitate before again saying, "yecheap nfl jerseys wholesales," this will be his last game "If we could win it, then it might be three major championships in a row, i always do not know when that has been done because we haven't usually won http://govoriotkrito.bg/libs/nflcn08.htmthe globe championships," Krzyzewski said. "It becomes an enormous thing for the program." Whatever, he's an awesome coach. His achievement are going to be remembered by the country.cheap nfl jerseys
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电磁铁

2013-12-27 8:17:15      点击:
电磁铁 是通电产生电磁的一种装置。在铁芯的外部缠绕与其功率相匹配的导电绕组,这种通有电流的线圈像磁铁一样具有磁性,它也叫做电磁铁(electromagnet)。我们通常把它制成条形或蹄形状,以使铁芯更加容易磁化。另外,为了使电磁铁断电立即消磁,我们往往采用消磁较快的的软铁或硅钢材料来制做。这样的电磁铁在通电时有磁性,断电后磁就随之消失。电磁铁在我们的日常生活中有着极其广泛的应用,由于它的发明也使发电机的功率得到了很大的提高。