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12 results
In diesem Video untersuche ich die Effektivität von Wasseraufbereitungs-Methoden wie Filtern und Kochen. Ich habe 3 Proben in ...
9,556 views
9 months ago
Testiamo la famosissima borraccia per potabilizzare l'acqua di un ruscelletto in cui praticamente si riversano gli scarichi di mezzo ...
5,705 views
10 months ago