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Harmonized System
Section V > Chapter 25 > Heading 2521
… Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement. …
Explanatory notes
… 25.21 ‑ Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement. This heading covers limestone flux and limestone and … steel industry. The heading also includes these materials when presented in powder form for soil improvement. However, …Section XVI > Chapter 84 > Heading 8405
… Producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers. …