求翻译：低温试验:实验温度为 -10℃，产品不包装，持续运行8小时放置恢复到常温，观察其外观，测试绝缘强度，指示功能及电性能应正常。是什么意思？

Low-temperature test: test temperature of -10 ℃, the product is not packaged, and running back to put eight hours at room temperature, to observe the appearance, dielectric strength testing, functional and electrical properties of the instructions should be normal.

Low-temperature experiments: Experimental temperature of - 10 C products, packaging, and continues to run 8 hours not placed back to the normal temperature, observe their appearance, insulation strength, instructions and electrical properties function should be normal.

Cold temperature test: The experimental temperature for -10℃, the product does not pack, moves 8 hours layings aside to restore the normal temperature continually, observes its outward appearance, the test insulation strength, the instruction function and the electricity performance should be normal

Low temperature testing: test temperature is-10 ° c, products are not packed, placed back to run 8 hours at room temperature to observe its appearance, testing dielectric strength, electrical properties of deictic and should function normally.