Vòi lọc nước mini
Hiện vẫn có hàng trăm triệu người trên thế giới không tiếp cận được với nguồn nước sạch. Đã có nhiều dự án lọc nước phục vụ cộng đồng, nhưng hầu hết áp dụng những phương pháp tốn kém...
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u57hu4g/4bqq4bub4bue4bugxILhurIvPeG6tOG6sj3huqpPw5nhur4qKuG7teG6qD3huqXFqMOTIOG6qOG6tOG7oeG7nuG7jMWo4bqqJuG7nuG6vuG7puG7nuG7puG7oOG7jOG7puG6si894bq0