E-H02A series constant temperature and humidity test box using Simulation of sunlight exposure ,rain and othe external environment。It takes only a few days or weeks to reproduce the destructive tests of the products exposed to ultraviolet radiation in the outdoor sun for a long time, and to see if the products have faded, discolored, decreased brightness, powdered, cracked, blurred, brittle, decreased strength and so on. At the same time, it can also reproduce the destructive phenomena caused by