British standard specification for Unplasticixed polyvinyl chloride (PVC-U) pipes and plastics fittings of nominal size 110 and 160 for beloe ground gravity drainage and sewerage
British standard specific...
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British standard specification for Unplasticixed polyvinyl chloride (PVC-U) pipes and plastics fittings of nominal size 110 and 160 for beloe ground gravity drainage and sewerage