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3521 Manufacture of gas
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Corresponding CPA codes
- 35.21.1 Coal gas, water gas, producer gas and similar gases, other than petroleum gases
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35.21.10 Coal gas, water gas, producer gas and similar gases, other than petroleum gases
This subcategory includes:
- gas for the purpose of gas supply by carbonation of coal, from by-products of agriculture or from waste
This subcategory excludes:
- crude natural gas, see 06.20.10
- refined petroleum products, see 19.20.3
- industrial gases, see 20.11.1