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ETCR ETCR1870 ສາຍຫັດນິລະໄພໃສ່ແຂນເພື່ອເຕືອນໄພຈາກໄຟຟ້າແຮງສູງ (AC 1kV~500kV, Button cell, 12 months) | EMIN.COM.LA