關於UL1446電氣絕緣系統 變壓器 Bobbin安規

Core Tube or Bobbin              
(Mechanical Support Only)
(Optional)

以上描述其Bobbin是否只作機械支撐用,不作絕緣用?
制作變壓器是否一定需在Bobbin的所有邊加貼絕緣膠帶? 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/40/1145889769.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">