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 · Web viewCarbon (carbon blacks and other forms of carbon not elsewhere specified or included). 2803.00.10 - Rubber grade carbon black 2803.00.20 - Acetylene black 2803.00.30 - Other carbon blacks 2803.00.90 Hydrogen, rare gases and other non-metals. 2804.10.00 - Hydrogen - Rare gases:2804.21.00 - - Argon 2804.29.00 2804.30.00 - Nitrogen 2804.40.00 - Oxygen