KESS electrical safety handbook, technical data, technical calculations, technical standards, KOSHA GUIDE, electrical safety fire regulations, compass, magnetic field, level

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Buku Pegangan Keselamatan Listrik KESS (Umum)
Data teknis, perhitungan teknis, standar teknis, PANDUAN KOSHA, peraturan kebakaran keselamatan listrik
kompas, medan magnet, level
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