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IEC 60747-5-4 Ed. 2.0 en:2022
4310 (RP-761) -- Real-Time Determination of Lubricant Concentrations Dissolved in Alternative Refrigerants
The First Century of Air Conditioning. Article 4: Early Twentieth Century Air-Conditioning Engineering
IEC 63203-201-1 Ed. 1.0 b:2022
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