Archived - Standard Industrial Classification - Establishments (SIC-E) 1980
- E - Manufacturing Industries
- 35 - Non-Metallic Mineral Products Industries
- 352 - Hydraulic Cement Industry
3521 - Hydraulic Cement Industry
Establishments primarily engaged in manufacturing hydraulic cement. Establishments primarily engaged in manufacturing refractory cements are classified in 3591 - Refractories Industry.
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