Section 16 MACHINERY AND MECHANICAL APPLIANCES; ELECTRICAL EQUIPMENT; PARTS THEREOF; SOUND RECORDERS AND REPRODUCERS, TELEVISION IMAGE AND SOUND RECORDERS AND REPRODUCERS AND PARTS AND ACCESSORIES OF SUCH ARTICLES 84 NUCLEAR REACTORS, BOILERS, MACHINERY AND MECHANICAL APPLIANCES; PARTS THEREOF 84 09 PARTS SUITABLE FOR USE SOLELY OR PRINCIPALLY WITH THE ENGINES OF Commodity Code Description 84 09 10 PARTS FOR AIRCRAFT ENGINES 84 09 91 PARTS FOR USE WITH SPARK-IGNITION ENGINES FOR ROAD MOTOR VEHICLES 84 09 99 PARTS FOR USE WITH DIESEL/SEMI-DIESEL ENGINES: FOR ROAD MOTOR VEHICLES