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BS 8211-1:1988 BS 8211-1:1988. Energy efficiency in housing. Code of practice for energy efficient refurbishment of housing BS 4737-3.0:1988 BS 4737-3.0:1988. Intruder alarm systems. Specifications for components. General requirements BS 812-117:1988 BS 812-117:1988. Testing aggregates. Method for determination of water-soluble chloride salts
