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Refrigerating systems and heat pumps. Safety and environmental requirements. Part 4. Operation, maintenance, repair and recovery
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Luminaires portable child-appealing. General specifications
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Refrigerating systems and heat pumps. Safety and environmental requirements. Part 1. Definitions, classification and selection criteria
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Technical energy systems. Structure for analysis. Energyware supply and demand sectors
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Petroleum and natural gas industries. Shell-and-tube heat exchangers. Technical requirements
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