| 摘要 |
PROBLEM TO BE SOLVED: To avoid a useless load increase by a coupler. SOLUTION: The coupler 21 is composed of a main coupler 22 mounted to a boom 3 of a machine body, and an auxiliary coupler 23 attached to and detached from the main coupler 22. A first attachment 7 is directly mounted to the main coupler 22, and a second attachment 8 is mounted to the main coupler 22 by the auxiliary coupler 23. COPYRIGHT: (C)2004,JPO&NCIPI
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