Chemicals used for treatment of water intended for human consumption. Chlorine1 Scope This European Standard is applicable to chlorine used for treatment of water intended for human consumption. It describes the characteristics of chlorine and specifies the requirements and the corresponding test methods for chlorine. It gives information on its use in water treatment.

This standard  describes requirements that

Examples of this are described in IEC 60502 (all parts)

Type 1: Airworthiness Certified Structural Unit

Pollution control authorities

What is BS 1881-131 - testing cement in a reference concrete about

Fibre optic components production companies

b) That is activated automatically on immobility of the wearer of the DSU and manually operated separately by the wearer

squareness

BS ISO 12647-6:2006 Graphic technology

Why should you use BS 2972 - Test methods for inorganic thermal insulating materials

or other definition documents

but between different ITS services and even with non-ITS services or a user’s system directly