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BS ISO 23550. Safety and control devices for gas burners and gas-burning appliances. General requirements Ingestion-build-251241 Conform to the design principles

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Conform to the design principles of BS ISO 3864 series

3) is applicable to the testing of liquid chemicals

Installers of devices

For dated references

BS EN 135  contains a list of terms that are commonly used in the field of respiratory protection

BS ISO 23550. Safety and control devices for gas burners and gas-burning appliances. General requirements Ingestion-build-251241 Conform to the design principles

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