Non-return arrangement or backflow prevention device for vacuum sewage system

• 1. 嵌入式安装防真空止回流阀 [P] . 中国专利： CN203463731U . 2014-03-05
• 2. 一种用于防止浇筑混凝土回流的泵管止回装置 [P] . 中国专利： CN210622331U . 2020.05.26
• 3. Backflow prevention system and vacuum pump equipped with the backflow prevention system [P] . 日本专利： JP5504107B2 . 2014-05-28

  机译： 防回流系统和配备有防回流系统的真空泵

• 4. BACKFLOW PREVENTION SYSTEM, AND VACUUM PUMP PROVIDED WITH THE BACKFLOW PREVENTION SYSTEM [P] . 日本专利： JP2012057192A . 2012-03-22

  机译： 防逆流系统，以及由防逆流系统提供的真空泵

• 5. backflow prevention device for sewage systems [P] . 德国专利： DE1658183A1 . 1970-09-10

  机译： 污水系统防回流装置

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• 10. An Enzyme Approach to the Prevention and Removal of Gelatinous Films in Raw Sewage Ultrafiltration Systems. [R] . Wang, S. S., Davidson, B., Gillespie, C., 1979

• 1. New Method of Thermal Energy—To Electrical Energy Conversion in Vacuum Devices with the Metal—Dielectric Nanofilm Electron Sources [J] . V. E. Ptitsin . 材料科学与应用期刊（英文） . 2018,第13期
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• 3. New endoscopy devices to improve population adherence to colorectal cancer prevention programs [J] . Asimina Gaglia ,Ioannis S Papanikolaou ,Wilfried Veltzke-Schlieker . 世界胃肠内镜杂志：英文版（电子版） . 2010,第7期
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• 5. CO2热泵干燥装置的干燥性能研究与回油装置优化 [A] . 何艳东 . 2017