Boxes and enclosures for electrical accessories for household and similar fixed electrical installations. Part 21. Particular requirements for boxes and enclosures with provision for suspension means
State system for ensuring the uniformity of measurements. Etalons for coordinate-temporal measurements. Basic principles. Ways for expressing the errors
Connecting devices. Safety requirements for screw-type and screwless-type clamping units. Part 2. Particular requirements for clamping units for conductors above 35 mm2 up to 300 mm2 (included)
Seamless and welded steel tubes. Part 3. Automated full peripheral flux leakage testing of ferromagnetic tubes for the detection of longitudinal and/or transverse imperfections
€10
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