84798940 under HS Code MACHINES AND MECHANICAL APPLIANCES HAVING INDIVIDUAL FUNCTIONS, NOT SPECIFIED OR INCLUDED ELSEWHERE IN THIS CHAPTER - OTHER MACHINES AND MECHANICAL APPLIANCES: OTHER: ULTRASONIC TRANSDUCERS, 85044090 under HS Code ELECTRICAL TRANSFORMERS, STATIC CONVERTERS (FOR EXAMPLE, RECTIFIERS) AND INDUCTORS -STATIC CONVERTERS: OTHER, and 84186990 under HS Code REFRIGERATORS, FREEZERS AND OTHER REFRIGERATING OR FREEZING EQUIPMENT, ELECTRIC OR OTHER; HEAT PUMPS OTHER THAN AIR CONDITIONING MACHINES OF HEADING 8415- OTHER REFRIGERATING OR FREEZING EQUIPMENT; HEAT PUMPS: OTHER: OTHER were the top imported HS Codes by MAGTRON VINA CO LTD in 2021.