Adjustable speed electrical power drive systems. Part 4. General requirements. Rating specifications for a.c power drive systems above 1000 V a.c. and exceeding 35 kV
Product quality index system. Compressors (air and gas driven ones) and refrigerating plants of refrigerating capacity exceeding 2.9 Kw (2500 kcal/h). Nomenclature of basic indices
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