 Solid solid phase change
            
            
            Solid solid phase change                     
                
                
            | Solid solid phase change | 
 Solid liquid phase change≤10℃
            
            
            Solid liquid phase change≤10℃                    
                
                
            | Solid liquid phase change≤10℃ | 
 10℃<Solid liquid phase change≤30℃
            
            
            10℃<Solid liquid phase change≤30℃                    
                
                
            | 10℃<Solid liquid phase change≤30℃ | 
 30℃<Solid liquid phase change≤60℃
            
            
            30℃<Solid liquid phase change≤60℃                    
                
                
            | 30℃<Solid liquid phase change≤60℃ | 
 Solid liquid phase change>60℃
            
            
            Solid liquid phase change>60℃                    
                
                
            | Solid liquid phase change>60℃ | 
 
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