853180000000 under HS Code ELECTRIC SOUND OR VISUAL SIGNALLING APPARATUS (FOR EXAMPLE, BELLS, SIRENS, INDICATOR PANELS, BURGLAR OR FIRE ALARMS), OTHER THAN THOSE OF HEADING 8512 OR 8530 OTHER APPARATUS, 850120000000 under HS Code ELECTRIC MOTORS AND GENERATORS (EXCLUDING GENERATING SETS) UNIVERSAL AC OR DC MOTORS OF AN OUTPUT EXCEEDING 37.5 W, and 854690000000 under HS Code Others were the top imported HS Codes by G S POWER INSTALLATION PTY LIMITED in 2021.