| 摘要 |
A shovel according to an embodiment of the present invention includes a main pump (14), a hydraulic pump-motor (310) configured to function as a hydraulic motor and as a hydraulic pump, a control valve (17), a first oil passage to connect the main pump (14) with an arm cylinder (8) through the control valve (17), and a second oil passage to connect the hydraulic pump-motor (310) with the arm cylinder (8). The second oil passage meets the first oil passage between the control valve (17) and the arm cylinder (8). |
