Lying comfortably in the bed for a day is the way to spend the weekend. Mattresses have become more important at that time. Generally speaking, the life span of a mattress is 8-10 years, but bad habits may greatly reduce the life span of the mattress. So...أكثر منLying comfortably in the bed for a day is the way to spend the weekend. Mattresses have become more important at that time. Generally speaking, the life span of a mattress is 8-10 years, but bad habits may greatly reduce the life span of the mattress. So how should the mattress be maintained?
In addition to the lighting, ventilation, substation and cooling systems of ordinary buildings, the important equipment system is the water treatment system.