Efek Variasi Waktu dan Jumlah Lilitan pada Sistem Filter Elektromagnetik Terhadap Penurunan Kadar Pb, Zn dan Co: (Effects of Time Variation and Number of Turns in Electromagnetic Filter Systems on Decreasing Levels of Pb, Zn and Co). Gravitasi [Internet]. 2020 Dec. 31 [cited 2026 Sep. 30];19(2):40-3. Available from: https://bestjournal.untad.ac.id/index.php/GravitasiFisika/article/view/15357