| 摘要 |
PROBLEM TO BE SOLVED: To reliably position a bracket at a prescribed position without using a jig when connecting the bracket formed with a plate-like member to the work arm of a work machine by welding and improve weld connection strength. SOLUTION: A groove section, which is formed on a work arm body and has a V-shaped cross section, and an edge section, which is formed on the plate-like member, has a V-shaped cross section, and is coupled with the groove, are provided at a junction between the plate-like member and the work arm body.
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