(under the class definition) Apparatus comprising power driven actuating means and means whereby a plurality of like elements (such as earth working elements or wheels) are moved one after another by the actuating means after only one setting of a control device for the actuating means.
(1) Note. Manually actuated devices are excluded. Power is derived from a motor such as a servomotor or by a mechanical power take-off as from a rolling wheel or motor.
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407, for a ground support which is vertically adjustable relative to a frame by power-operated means.