Annual Survey of Manufactures (ASM) 2004 - List of Goods
3271234 - Other structural clay products (architectural terra cotta, drain tile, flue tile, roofing tile, and conduit), except clay refractories
Examples of included products:
- Ceramic architectural and construction chimney pots & cowls
- Ceramic pipes, conduits, guttering and pipe fitting, other than sewer pipe and fittings
- Ceramic roofing tiles
- Clay drain tile
- Flue linings
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