,  ,             | 
                  
            Device for demonstrating the magentic field of an electric current           | 
              
          
                  
                        | 
                  
            Device for Magnetic Assisted Cathodic Sputtering           | 
              
          
                  
                        | 
                  
            Device for showing synchronous motions           | 
              
          
                  
             ,  ,  ,             | 
                  
            Device for the study of the composition of movements           | 
              
          
                  
             ,             | 
                  
            Dietetic scale           | 
              
          
                  
                        | 
                  
            Digital Computer           | 
              
          
                  
                        | 
                  
            Dip circle           | 
              
          
                  
                        | 
                  
            Dip circle           | 
              
          
                  
                        | 
                  
            Dipleidoscope           | 
              
          
                  | 
                       | 
                  
            Direct Current Amperometer           |