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| Subject | Latvian | English |
| environ. | naftas rūpniecība | petroleum industry Manufacturing industry utilizing complex combination of interdependent operations engaged in the storage and transportation, separation of crude molecular constituents, molecular cracking, molecular rebuilding, and solvent finishing to produce petrochemical products |
| econ. | naftas rūpniecība | oil industry |
| environ. | naftas un tauku pārstrādes rūpniecība | oil and fat industry Industry for the production and processing of edible oils and fats |
| environ. | naftas ķīmijas rūpniecība | petrochemical industry The production of materials derived from petroleum or natural gas |