Electrical engineering; earth, protective conductor, noisless earth; frame or chassis, class II equipment; graphical symbols on electrical equipment— 7 стр.
Measurement of noise emitted by machines; airborne noise emission; enveloping surface method and special reverberation room method; household and similar electrical appliances; particular requirements for washing machines and spin extractors (IEC 60704-2-4:1989); german version HD 423.2.4 S1:1989— 9 стр.