State system for ensuring the uniformity of measurements. State primary standard and all-union verification schedule for means measuring mass flow of gas within the range of 4x10 in minus 2 degree up to 2,5x10 in 2 degree kg/sec
United power system and isolated power systems. Relay protection and automation. Automatic emergency control of electric power systems. Automatic elimination of asynchronous mode. Norms and requirements
Rectangular weld moulding boxes of cast steel elements having inside dimensions: length from 600 to 900 mm, width from 500 to 700 mm, height from 125 to 400 mm. Construction and dimensions
€10
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