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BS ISO 20469. Guidelines for water quality grade classification for water reuse Ingestion-build-111333 ISO 20251 specifies the laboratory
BS ISO 20469. Guidelines for water quality grade classification for water reuse Ingestion-build-111333 ISO 20251 specifies the laboratory
$20.00
Description
ISO 20251 specifies the laboratory test method for determining the water impermeability of textile floor coverings
The change in colour of the specimen and the staining of the adjacent fabrics are assessed using the grey scales
1(1) P General conditions
tolerance class c
BS ISO 20469. Guidelines for water quality grade classification for water reuse Ingestion-build-111333 ISO 20251 specifies the laboratory
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