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Priority to JP13398181UpriorityCriticalpatent/JPS5838894U/ja
Publication of JPS5838894UpublicationCriticalpatent/JPS5838894U/ja
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Publication of JPS6214235Y2publicationCriticalpatent/JPS6214235Y2/ja
Method of presssin propulsive construction of underground buried pipe* such as* waterrworks* sewerage* gas* etc* onto weak ground* such as* silt* etc* and gravel layer ground with much grounddwater an