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Engines and motors, other than for land vehicles; drives and motors for machines; electrical engines; indexing drives; speed changers; housings for machines, drives, motors and engines; engine housings; control apparatus for machines, drives, motors and engines; motor drives units for switchgear, tap changers, on-load tap changers and diverters; generators.Technical and electric installations for heavy- current technology, light-current technology, high-voltage technology and extremely high-voltage technology; transformers [electricity]; distribution transformers; diverters; stepping switches; on-load tap changers; switching equipment; sensors; sensors and measuring equipment for power (electric); sensors and measuring equipment for voltage (electric); sensors and measuring equipment for energy (electric); sensors and measuring equipment for performance (electric); sensors and measuring equipment for impedance (electric); sensors and measuring equipment for performance factor; sensors and measuring equipment for phase shift; sensors and measuring equipment for loss factor; sensors and measuring equipment for partial discharge; sensors and measuring equipment for analysing dissolved gases; sensors and measuring equipment for the transmission ratio of transformers.