APPARATUS FOR PREVENTING FREEZING CITY WATER PIPE

• 1. 一种防止氨水管道冻结的反吹装置 [P] . 中国专利： CN213394628U . 2021-06-08
• 2. 一种防止化霜水二次冻结的热泵机组、一种热泵机组及防止其化霜水二次冻结的方法 [P] . 中国专利： CN113669949A . 2021-11-19
• 3. APPARATUS FOR PREVENTING FREEZING OF CITY WATER PIPE [P] . 日本专利： JPS58195644A . 1983-11-14

  机译： 防止城市水管冻结的装置

• 4. APPARATUS FOR PREVENTING FREEZING CITY WATER PIPE [P] . 日本专利： JPS5894536A . 1983-06-04

  机译： 防止冻结城市水管的装置

• 5. HEATER FOR PREVENTING FREEZING OF CITY WATER PIPE [P] . 日本专利： JPH07331708A . 1995-12-19

  机译： 防止城市水管冻结的加热器

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• 7. Preventing Livestock Water from Freezing [R] . McKenzie, D. W. , Kashuba, T. J. , Waddington, D. , 1983

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