| Standard International Trade Classification (SITC) - level 2 - Division | 71 | Power-generating machinery and equipment | 
                
                  
                    | Standard International Trade Classification (SITC) - level 4 - Sub-group | 7131 | Internal combustion piston engines for aircraft | 
                
                  
                    | Standard International Trade Classification (SITC) - level 4 - Sub-group | 7132 | Internal combustion piston engines for vehicles | 
                
                  
                    | Standard International Trade Classification (SITC) - level 4 - Sub-group | 7133 | Inter.combustion piston engines for marine propulsion | 
                
                  
                    | Standard International Trade Classification (SITC) - level 4 - Sub-group | 7138 | Internal combustion piston engines, n.e.s. | 
                
                  
                    | Standard International Trade Classification (SITC) - level 4 - Sub-group | 7139 | Parts for internal combustion piston engines |