| 摘要 |
PROBLEM TO BE SOLVED: To easily position a weight 21 to a base frame 20. SOLUTION: The slewing working machine has the base frame 20 constituting the lower section of a swivel base 3 and the weight 21 installed at the rear section of the base frame 20, and the weight 21 is positioned to the base frame 20 by placing both left-right side sections and approximately left-right central sections of the weight 21 onto the base frame 20.
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