State system for ensuring the uniformity of measurements. Reference systems for certification reference materials composition of magistral natural gas and substitute natural gas. The method of verification
Fixed electric double-layer capacitors for use in electric and electronic equipment. Part 2. Group specification for capacitors for power electric and electronic equipment
Low-voltage switchgear and controlgear. Part 4-3. Contactors and motor-starters. Semiconductor controllers and semiconductor contactors for non-motor loads
Uniform provisions concerning the approval of motor vehicle headlamps emitting a symmetrical passing beam or a driving beam or both and equipped with filament lamps
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