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设计一个电镇,12V供电,知道启动电压195,启动电流35,功率是7W的,2U和3U的灯管其电感电容等参数如何计算?????500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/45/1159321369.gif');}" onmousewheel="return imgzoom(this);">
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