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Hitachi Ltd
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Hitachi Ltd
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Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP3263876ApriorityCriticalpatent/JPS52116560A/en
Publication of JPS52116560ApublicationCriticalpatent/JPS52116560A/en
PURPOSE: To elevate aluggage under control from extremely slow speed, low and high speeds by two driving systems with main motor and auxiliary motor with stepless speed control unit for controlling extremely low speed elevation through the same main reduction gear without special motor nor reduction gear.