| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to stably receive the rotation reaction without damaging crawler for a crawler working machine when receiving the rotation reaction by using the crawler working machine. SOLUTION: A laid steel plate 5 bas a joint portion 4 jointed detachably to one end portion of the main body 3 of an all-around rotation excavator 1 and a crawler 7 of a crawler working machine 6 is placed on the laid steel plate 5.
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