| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic device capable of reducing shock on starting. SOLUTION: The opening of a control valve 52 is changed via an interlocking mechanism 62 in response to the turning angle of an operation lever 4 in an ON area A- ON so that a working fluid discharged from a hydraulic pump 2 must not be immediately supplied to an external actuator even when an electric motor 1 is started.
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