90328100 under HS Code AUTOMATIC REGULATING OR CONTROLLING INSTRUMENTS AND APPARATUS - OTHER INSTRUMENTS AND APPARATUS: HYDRAULIC OR PNEUMATIC, 85365010 under HS Code ELECTRICAL APPARATUS FOR SWITCHING OR PROTECTING ELECTRICAL CIRCUITS, OR FOR MAKING CONNECTIONS TO OR IN ELECTRICAL CIRCUITS (FOR EXAMPLE, SWITCHES, RELAYS, FUSES, SURGE SUPPRESSORS, PLUGS, SOCKETS, LAMP-HOLDERS, JUNCTION BOXES), FOR A VOLTAGE NOT EXCEEDING 1,000 VOLTS - OTHER SWITCHES: CONTROL AND SWITCH GEARS, and 84123100 under HS Code OTHER ENGINES AND MOTORS - PNEUMATIC POWER ENGINES AND MOTORS: LINEAR ACTING (CYLINDERS) were the top imported HS Codes by WINSTON CORPORATION in 2021.