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Renewable power engineering. Wind power engineering. Wind turbines. Part 4. Design requirements for wind turbine gearboxes
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Renewable power engineering. Thermal solar systems and components. Solar collectors. Part 1. General requirements
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Electrical insulation. Thermal evaluation and designation
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Insulators for contact net of railways. General specifications
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Lampholders for tubular fluorescent lamps and starter holders
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Lamp caps and holders for light sources together with gauges for the control of interchangeability and safety. Part 1. Lamp cap
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