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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交流接触器断续周期工作制

2014/2/12 9:07:36      点击:
交流接触器断续周期工作制 断续周期工作制也就是反复短时工作制,是指接触器闭合和断开的时间都太短不足以使接触器达到热平衡的工作制。显然影响此类接触器时间寿命的主要因素是操作的累计次数。描述断续周期工作制的主要参数是通电持续率和操作频率,通电持续率标准值为15%、25%、40%、60%四种,操作频率则分为8级(1,3,12,120,300,600,1200),每级的数字即表示该接触器额定的每小时操作频率数。通常操作频率100次/h以上的设备属于重任务设备,典型的设备有工作母机(车、钻、铣、磨)、升降设备、轧机设备、离心机,炼焦行业的焦炉四大车也是重任务断续周期工作制。操作频率超过600次/h的设备属于特重任务设备,此类的设备主要是类似我公司卸煤机的港口起重设备和轧机上的某些装置。