State system for ensuring the uniformity of measurements. State special standard and all-union verification schedule for means measuring phase shift angle within frequency range from 8,2 to 12 GHz
State system for ensuring the uniformity of measurements. Standard reference data. The density and thermal expansion of liquid lithium-lead alloys in the temperature range from the liquidus line to 1050 K and in the concentration range from 10 at. % to 84.3 at. % Pb
Low-voltage switchgear and controlgear. Part 5-5. Control circuit devices and switching elements. Electrical emergency stop devices with mechanical latching function
€10
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