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 56 MACHINE-TOOLS FOR WORKING ANY MATERIAL BY REMOVAL OF MATERIAL, BY 84 56 20 MACHINE TOOLS FOR WORKING ...OPERATED BY ULTRASONIC PROCESSES Commodity Code Description 84 56 20 00 MACHINE TOOLS FOR WORKING ...OPERATED BY ULTRASONIC PROCESSES