Cylindrical helical compression (extension) springs made of special steels and alloy. General specifications
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Electromagnetic compatibility of technical equipment. Industrial, scientific, medical and domestic (ISMD) high-frequency equipment. Radio disturbance. Limits and methods of measurement
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Broadcasting transmitters, fixed Very High Frequency (VHF). Main parameters, technical requirements and methods of measurement
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Elements of building constructions. Fire doors and gates. Fire resistance test method
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