螺旋线圈绝缘,不甚感激!!!

用纱布一层层的裹起来,在纱布外面刷了一层什么东西?象一种油,纱布变的很硬.首先可以肯定不是象做变压器那样的浸漆!
螺旋线圈如下图: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/61/1023961199930034.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">