Detailed structure and explanatory notes
ISIC Rev.4 code 2391Structure
This class includes:
- manufacture of refractory mortars, concretes etc.
- manufacture of refractory ceramic goods:
· heat-insulating ceramic goods of siliceous fossil meals
· refractory bricks, blocks and tiles etc.
· retorts, crucibles, muffles, nozzles, tubes, pipes etc.
This class also includes:
- manufacture of refractory articles containing magnesite, dolomite or chromite
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