Colloidal silver bowl to clarify rich in Yemen On YouTube.
You will see the production of ceramic filters for the supply of drinking water in Yemen and the use of colloidal silver in drinking water bacteria-free filter, through the GTZ IWRM in Yemen in 2008 have introduced
Tags: decentralized, water, supply, colloidal, silver, ceramic, filter, gtz-IWRM, Yemen, gtz, pfp, Richard, Boni
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