Rectangular weld moulding boxes of cast steel elements having inside dimensions: length from 400 to 500 mm, width from 300 to 500 mm, height from 100 to 250 mm. Construction and dimensions
State system for ensuring the uniformity of measurements. State verification schedule for measuring instruments of alternating current from 1·10 -8 to 100 A in the frequency range from 1·10 -1 to 1·10 6 Hz
