Wood is a hygroscopic material. When the wet material is placed in the air, it will evaporate continuously. When the dry material is placed in the air, the moisture in the air will be absorbed by the wood. The speed of evaporation and absorption of water will be equal, and the state will be dynamically balanced. The water content at this time is the equilibrium moisture content. The equilibrium moisture content of wood is affected by atmospheric humidity and varies by region. The northern part is about 12%, the south is about 18%, and the middle school is about 16%. The equilibrium moisture content of wood has great significance in production. The moisture content of furniture, doors and windows, interior decoration and other materials must be dried below the equilibrium moisture content of the area of ​​use, otherwise the wood products will crack and deform. Digital Display Time Relay,Digital Display Timer Relay,Electronic Time Delay Relay,Digital Display Timer Yuyao Gongyi Meter Co.,Ltd. , https://www.yycj.com