... Quality We make a difference !About KeramKeram (Nanjing) Science & Tech Co. Ltd, is a high tech company who is mainly engaged in manufacturing the ... give a brief definition, geothermal is the energy from the earth, it is non-contaminative and sustainable. We have two sources ... of the geothermal: One is coming from the center of earth, in other words, it means the centrosphere, the temperature has ...