Cores for inductors and transformers for telecommunications - Methods of measurement Ingestion-build-109673 BS 1728-15 provides you with

BS 1728-15 provides you with the principle of nickel using the photometric method in which the alloy is dissolved in sodium hydroxide solution and the insoluble material containing the nickel is dissolved in acid

BS EN 1314-1 is about performance testing of components /products for residential ventilation both for external and internal mounted air transfer devices

Annex C (informative) Operating parameters

7 m in height for use in dwellings in combination with designs in accordance with the recommendations of BS 5268-6

BS 5918:1989

Cores for inductors and transformers for telecommunications - Methods of measurement Ingestion-build-109673 BS 1728-15 provides you with