| 摘要 |
PROBLEM TO BE SOLVED: To provide a digger for deep shaft, using a single long stick for a double blade shovel. SOLUTION: A long hollow stick is provided to one side of the double blade shovel, whereas an extremely short stick is provided to the symmetrical other side. An elastic rubber is fitted to the long stick just above the bolt connecting the double blade shovel, and a metal ring fitted to the long stick is turned over the short stick to be fixed thereto so as to make the double blade shovel in a use state. Thereby, the double blade shovel with the single stick is provided. COPYRIGHT: (C)2009,JPO&INPIT
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