October 2018 1 21 Report
Apa fungsi sabut kelapa, pecahan batu bata, pasir halus, pasir pantai, kerikil, arang kayu, arang batok kelapa, lempengan batu, jerami, dan kapas pada penyaringan penjernih air alami..
Plis jawab buat tugas besok pagi..
:) :) :) :) :)

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