Display device for the degree of calcification of water heaters in electrical house hold or otherwise, in particular electric coffee machines

• 1. 采用限流方式的运放电路控制蓄热式电热水器防电墙装置 [P] . 中国专利： CN1738130A . 2006-02-22
• 2. 采用限压方式的运放电路控制蓄热式电热水器防电墙装置 [P] . 中国专利： CN1719681A . 2006-01-11
• 3. Display device for the degree of calcification of water heaters in electrical house hold or otherwise, in particular electric coffee machines [P] . 德国专利： DE2659079B2 . 1978-11-30

  机译： 用于显示家用电热水器或其他方式中的热水器的钙化程度的显示设备，特别是电咖啡机

• 4. Display device for the degree of calcification of water heaters in electrical house hold or otherwise, in particular electric coffee machines [P] . 德国专利： DE2659079A1 . 1978-06-29

  机译： 用于显示家用电热水器或其他方式中的热水器的钙化程度的显示设备，特别是电咖啡机

• 5. An electrical water heater of an electrical house hold machine being operated, for example a coffee machine or a eggs stove [P] . 德国专利： DE2950804B1 . 1981-04-09

  机译： 正在操作的家用电烤箱的电热水器，例如咖啡机或煮蛋炉

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