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 London 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 staying 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, "yes," 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 the 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.
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接触器触头烧损如 何处理

2014/7/28 9:31:35      点击:
  接触器触头在长时 间使用或频繁通断电路时,会受到电弧的烧损。接触器触头一般是表面镀银或银合金制成,由电弧作用,触头表面形成一层黑色的氧化银或硫化银,但它们的导电性能仍然良好,无须清除或修理。在负载要求频繁起动的线路中使 用的接触器,或其频繁起动,起动电流冲击也频繁,触头的表面会被电弧烧毛,变得凹凸不平。如触头虽有变黑、烧毛情况,但凹凸不太严重,可不处理。但如果触头表面烧毛、凹凸过分严重,就会大大增加接触电阻,这时应及 时锉平。或用零号沙布磨平。40A以上接触器除挫平 外,还应调整三相触头的同步。
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