| 摘要 |
PROBLEM TO BE SOLVED: To simply operate a switch for an acoustic device without releasing a grip part of a control lever for operation while an operator still takes a seat on a predetermined position of an operator sheet. SOLUTION: The grip part 27 of the control lever 23 is provided with the switch for operating the acoustic device, and while the operator is still seated on a predetermined position, the switches SW1 to SW5 are directly operated by fingers or the like without releasing the grip part 27 of the operating lever 23 for work. COPYRIGHT: (C)2006,JPO&NCIPI
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