jinzhenrongs https://blog.hatena.ne.jp/jinzhenrongs/ vacuum pump https://coatingmachine.hateblo.jp/ ,"entityRanges":,"data":{}},{"key":"49cuu","text":"Roots water ring vacuum system used in electronic circuit board lamination application ","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":0,"length":89,"key":0}],"data":{}}],"entityMap":{"0":{"type":"LINK","mutability":"M… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcoatingmachine.hateblo.jp%2Fentry%2F2021%2F07%2F05%2F180928" title="The difference and connection of vacuum pump oil, compressor oil and refrigeration oil - 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 2021-07-05 18:09:28 rich https://coatingmachine.hateblo.jp/entry/2021/07/05/180928 1.0 100%