7017100000 under HS Code LABORATORY, HYGIENIC OR PHARMACEUTICAL GLASSWARE, WHETHER OR NOT GRADUATED OR CALIBRATED - OF FUSED QUARTZ OR OTHER FUSED SILICA, 8421290009 under HS Code CENTRIFUGES, INCLUDING CENTRIFUGAL DRYERS; FILTERING OR PURIFYING MACHINERY AND APPARATUS, FOR LIQUIDS OR GASES FILTERING OR PURIFYING MACHINERY AND APPARATUS FOR LIQUIDS: OTHER, and 8421392009 under HS Code CENTRIFUGES, INCLUDING CENTRIFUGAL DRYERS; FILTERING OR PURIFYING MACHINERY AND APPARATUS, FOR LIQUIDS OR GASES FILTERING OR PURIFYING MACHINERY AND APPARATUS FOR GASES: OTHER: AIR PURIFIERS OR CLEANERS were the top imported HS Codes by TEMERSO ENGINEERING LLC in 2021.