69039010 under HS Code OTHER REFRACTORY CERAMIC GOODS (FOR EXAMPLE, RETORTS, CRUCIBLES, MUFFLES, NOZZLES, PLUGS, SUPPORTS, CUPELS, TUBES, PIPES, SHEATHS AND RODS), OTHER THAN THOSE OF SILICEOUS FOSSIL MEALS OR OF SIMILAR SILICEOUS EARTHS - OTHER: ZIRCON OR ZIRCON-MULLITE REFRACTORIES, 84804900 under HS Code MOULDING BOXES FOR METAL FOUNDRY; MOULD BASES; MOULDING PATTERNS; MOULDS FOR METAL (OTHER THAN INGOT MOULDS), METAL CARBIDES, GLASS, MINERAL MATERIALS, RUBBER OR PLASTICS - MOULDS FOR METAL OR METAL CARBIDES: OTHER, and 85144000 under HS Code INDUSTRIAL OR LABORATORY ELECTRIC FURNACES AND OVENS (INCLUDING THOSE FUNCTIONING BY INDUCTION OR DIELECTRIC LOSS); OTHER INDUSTRIAL OR LABORATORY EQUIPMENT FOR THE HEAT TREATMENT OF MATERIALS BY INDUCTION OR DIELECTRIC LOSS OTHER EQUIPMENT FOR THE HEAT TREATMENT OF MATERIALS BY INDUCTION OR DIELECTRIC LOSS were the top imported HS Codes by GENERAL ENGINEERING INDUSTRIES in 2021.