Elvan filter and Elvan water filter are our unique technology in the world and we adopted DMMFDouble Motor Multi Filters system of which is patented.
淡英斑岩过滤器和淡英斑岩滤水器是我公司世界独创
术，我们采用DMMF（双发动机多重过滤器）系统,该系统已获专利。
Elvan filter and Elvan water filter are our unique technology in the world and we adopted DMMFDouble Motor Multi Filters system of which is patented.
淡英斑岩过滤器和淡英斑岩滤水器是我公司世界独创术，我们采用DMMF（双发动机多重过滤器）系统,该系统已获专利。
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