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Priority to JP18939482UpriorityCriticalpatent/JPS5991406U/ja
Publication of JPS5991406UpublicationCriticalpatent/JPS5991406U/ja
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Publication of JPS6242092Y2publicationCriticalpatent/JPS6242092Y2/ja
Lubricating oil filter for internal combustion engines, particularly of motor vehicles, with members for monitoring the degree of clogging of the filtration surface