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【Tema del día】【Edición eléctrica 20161007】

2016-10-07View Original

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Recompensa por participación: 2 riquezas. Recompensa por respuesta correcta: 9 riquezas. En los lugares indicados abajo ( ), la línea de tierra debe conectarse a los elementos de puesta a tierra en al menos dos puntos.   A. Entornos con riesgo de incendios B. Subestaciones eléctricas C. Entornos con gases no explosivos D. Salas de control contra incendios. Respuesta correcta: AB
Reply #22016-10-07
AB、、、、、、、、、、、、

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