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
<td id="gu7nx"><input id="gu7nx"></input></td>
<form id="gu7nx"><optgroup id="gu7nx"></optgroup></form>

    1. <style id="gu7nx"><kbd id="gu7nx"></kbd></style>

    電磁鐵應(yīng)用

    2013/12/24 8:34:21      點(diǎn)擊:

    電磁鐵:利用電流的磁效應(yīng),使軟鐵具有磁性的裝置。
    (1)將軟鐵棒插入一螺線形線圈內(nèi)部,則當(dāng)線圈通有電流時(shí),線圈內(nèi)部的磁場(chǎng)使軟鐵棒磁化成暫時(shí)磁鐵,但
    電流切斷時(shí),則線圈及軟鐵棒的磁性隨著消失。
    (2)軟鐵棒磁化后所生成的磁場(chǎng),加上原有線圈內(nèi)的磁場(chǎng),使得總磁場(chǎng)強(qiáng)度大為增強(qiáng),故電磁鐵的磁力大于 天然磁鐵。
    (3)螺線形線圈的電流愈大,線圈圈數(shù)愈多,電磁鐵的磁場(chǎng)愈強(qiáng)。
    電磁鐵的應(yīng)用:
    (1)起重機(jī):為工業(yè)用的強(qiáng)力電磁鐵,通上大電流,可用以吊運(yùn)鋼板、貨柜、廢鐵等。
    (2)電話:下一節(jié)介紹。
    (3)安培計(jì)、伏特計(jì)、檢流計(jì)
    (4)電鈴等等。
    (5)自動(dòng)化控制設(shè)備
    (6)工業(yè)自動(dòng)化控制、辦公自動(dòng)化。
    (7)包裝機(jī)械、醫(yī)療器械、食品機(jī)械、紡織機(jī)械等。
    (8)電磁繼電器
    (9)磁懸浮列車(chē)

    電磁鐵 http://m.hqbet5695.com/Product/diyayuanqijian/diancitie/

    亚洲色欲大片AAA无码,欧美精品一区三区在线观看,久久精品人人做人人爽不卡,国产日韩伦精无码一区二区
    <td id="gu7nx"><input id="gu7nx"></input></td>
    <form id="gu7nx"><optgroup id="gu7nx"></optgroup></form>

    1. <style id="gu7nx"><kbd id="gu7nx"></kbd></style>