State system for ensuring the uniformity of measurements. State verification schedule for measuring instruments of aerosols, suspensions and powdery materials
Low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Electrical safety. Equipment for testing, measuring or monitoring of protective measures. Part 1. General requirements
Requirements to operation of synchronization systems equipment of communication networks: circuit-switched communication networks, packet-switched communication networks
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