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[1] Fertilizer irrigation system

[2] Used Sodium Hydroxide car wash detergent barrel to collect rain water

[3] Hydroalcoholic disinfectant from refineries

[4] Electrolysed water?

[5] Copper against Covid

[6] Centrifuge question!

[7] Coffee filters as face masks?

[8] 99.9% Isopropyl Alcohol

[9] Percarbonate against Covid

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