Low-voltage switchgear and control gear assemblies. Part 2. Particular requirements for busbar trunking systems ( busways )
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Steam-water heaters for heat supply systems. General specifications
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Velocity gas meters. General technical requirements and test methods
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Instruments for measuring the level of liquids and loose materials. General technical requirements and test methods
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Plane-angle standards of the prism type. General specifications
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Strain gauge load cells. General technical requirements and testings methods
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