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Priority to JP18887182UpriorityCriticalpatent/JPS5991290U/ja
Publication of JPS5991290UpublicationCriticalpatent/JPS5991290U/ja
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Publication of JPS6139751Y2publicationCriticalpatent/JPS6139751Y2/ja
Support arrangement including base support means and elevatable support means to transport a drawworks and drilling mast supported thereon and for positioning at a drilling location