求翻译：恒定湿热试验:实验温度为40℃ ±2℃，湿度为 90%～95%，产品不包装，持续时间为48 小时，测试后对其外观，绝缘强度，指示功能及电性能进行重新测试，外露金属部分不应有锈蚀，内部无击穿、飞弧现象，指示功能及电性能正常。是什么意思？

Damp heat test: test temperature of 40 ℃ ± 2 ℃, humidity 90% to 95%, the product is not packaged, duration of 48 hours of its appearance after the test, dielectric strength, indicating functional and electrical properties of re-testing, the exposed There should be corrosion of metal parts, no intern

constant humidity in the temperature test: experiments ± 2° 40 °C C, humidity is 90 percent to 95 percent, and the duration, no packaging products for 48 hours after the test, to its appearance, insulation and electrical properties feature intensity, instructions for re-testing Exposed metal parts,

Constant humid-heat test: The experimental temperature for 40℃ ±2℃, the humidity is 90%~95%, the product does not pack, the duration is 48 hours, after the test to its outward appearance, the insulation strength, instructed the function and the electricity performance carry on test, appear externall

Constant hot and humid test: experimental temperature to 40 ° c ± 2 ° c, humidity 90%~95%, products are not packaged, duration of 48 hours, after tests on its appearance, dielectric strength, electrical properties of deictic and retesting, damp there should be no rust, no breakdown, flying arc pheno