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【12-5】Soal Harian untuk Kesehatan Kerja

2016-12-05View Original

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Pos ini terakhir diedit oleh A Chuan pada tanggal 2016-12-6 pukul 08:58. 【12-5】Soal harian edisi kesehatan kerja: Pertanyaan pilihan ganda: Debu sekunder merupakan sumber utama debu di dalam tambang batu bara. Ya
Reply #22016-12-05
Debu sekunder merupakan sumber utama debu di bawah tambang batu bara. (V)

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