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Low-voltage electrical installations. Part 4.44. Protection for safety. Protection against voltage disturbances and electromagnetic disturbances
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Cotton and blended fabrics finished with synthetic resins. General specifications
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State system for ensuring the uniformity of measurements. State verification schedule for variable pressure measuring instruments in the range from 1·10 2 to 2,5·10 7 Pa for frequencies from 5·10 -1 to 1·10 4 Hz and durations from 1·10 -5 to 10 s under constant pressure up 5·10 6 Pa
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Honing and lapping vertical machines. General specifications
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Hexagon drive ends for hand- and machine-operated screwdriver bits. Dimensions
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