| http://www.w3.org/ns/prov#value | - Generally, in a hydraulic power system suitable for driving, by a hydraulic motor, a load having high inertia, such as a swivelling member of a hydraulic excavator, it is necessary to detect whether the hydraulic motor is inoperative or operating at a velocity near a point at which it is inoperative, in order to automatically actuate motor stopping means for preventing the hydraulic motor from rot
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