84    Nuclear reactors, boilers, machinery and mechanical appliances;
        parts thereof.
           

85    Electrical machinery and equipment and parts thereof; sound
        recorders and reproducers, and parts and accessories of such
        articles.
                                                                                                     

86  Railway or tramway locomotives, rolling-stack and parts thereof; railway or tramway track fixtures and fittings and parts thereof; mechanical (  including electro-mechanical) traffic signalling equipment of all kinds.                             

87   Vehicles other than railway or tramways rolling-stock , and parts and accessories thereof. 

88    Aircraft , spacecraft , and parts thereof.
89    Ships, boats and floating structures .   

90   Optical, photographic, cinematographic , measuring, checking,
 
       precision, medical or surgical instruments and apparatus; parts

       and accessories thereof.                   

91  Clocks and watches and parts there of .                                                             

92  Musical instruments; parts and accessories of such articles.