2320 Manufacture of refractory products
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2320 Manufacture of refractory products
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- 23.20.1 Refractory products
- 23.20.11 Bricks, blocks, tiles and other ceramic goods of siliceous fossil meals or earth
- 23.20.12 Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, other than of siliceous fossil meals or earths
- 23.20.13 Refractory cements, mortars, concretes and similar compositions n.e.c.
- 23.20.14 Unfired refractory products and other refractory ceramic goods
- 23.20.9 Sub-contracted operations as part of manufacturing of refractory products
- 23.20.99 Sub-contracted operations as part of manufacturing of refractory products