Direct acting indicating analogue electrical measuring instruments and their accessories. Definitions and general requirements common to all parts— 46 стр.
Electrical apparatus for explosive gas atmospheres. Construction, test and marking of type of protection encapsulation "m" electrical apparatus— 38 стр.
Secondary cells and batteries containing alkaline or other non-acid electrolytes. Sealed nickel-cadmium small prismatic rechargeable single cells— 16 стр.
