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Priority to JP1972083230UpriorityCriticalpatent/JPS5231281Y2/ja
Publication of JPS4939802UpublicationCriticalpatent/JPS4939802U/ja
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Publication of JPS5231281Y2publicationCriticalpatent/JPS5231281Y2/ja
E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
E02F3/966—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of hammer-type tools