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Hitachi Ltd
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Hitachi Ltd
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Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP6461076ApriorityCriticalpatent/JPS52148706A/en
Publication of JPS52148706ApublicationCriticalpatent/JPS52148706A/en
PURPOSE: To prevent the excesses of control, by using temp difference between steam temp and metal temp as the preceeding value of theremal stress change.