... switch GB14048.5-2001.The product model and its meaning1.Don't exceed around the air temperature +40°C,And the average temperature ... +35°C, 2.Around the upper air temperature than for -5°C, 3.Install the ... of not more than 2000m, 4.The highest temperature +40°C When,The relative humidity is ... humidity,Such as20°C tp 90%.Due to temperature change occasionally produces special measures should be taken ...