jinzhenrongs https://blog.hatena.ne.jp/jinzhenrongs/ vacuum pump https://coatingmachine.hateblo.jp/ Judge the color of transformer insulation oil filtered by oil filter The determination of the color change after the filter of transformer insulation oil filter is mainly based on the naked eye observation to determine the depth of oil color. The color of the oil depends on the content of pitch, res… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcoatingmachine.hateblo.jp%2Fentry%2F2020%2F05%2F26%2F175040" title="Judge the color of transformer insulation oil filtered by oil filter - vacuum pump" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2020-05-26 17:50:40 rich https://coatingmachine.hateblo.jp/entry/2020/05/26/175040 1.0 100%