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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小型继电器的选型

2014/1/6 16:31:35点击:

小型继电器的选型

 

 

小型继电器(电磁)的工作原理由电磁铁、弱电电源和电键组成控制电路。由电动机、强电电源

 

小型和电磁继电器的触点部分组成工作电路。闭合控制电路:电磁铁线圈中有控制电流通过时,

小型继电器电磁铁就吸引衔铁,使工作电路触点闭合,电动机启动。断开控制电路:电磁铁失去磁性,

小型继电器弹簧把衔铁拉起,

小型继电器在触点处切断工作电路,

小型继电器电动机停止工作。

小型继电器利用电磁继电器可以用低电压、

小型继电器弱电流的信号电路来控制高电压、强电流的工作电路。