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Air supply
cylindrical or in the form of sacks and bags
c) by-products of industrial processes
and concrete
whose workability is outside the normal range for concrete as defined in ENV 206
Chimneys. Components. Concrete flue blocks Ingestion-build-48974 Air supply1 Scope This European Standard specifies the materials, dimensional and performance requirements for precast concrete flue blocks as defined in Clause 3 for use in deleted text chimneys. The flue blocks may be of single wall or multi wall construction. The standard does not apply to flue blocks with back ventilation. This standard does not cover products designated wet (W) in conjunction with corrosion class 3. The standard also specifies a type of
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