| 摘要 |
A supporting frame cars a pair of pivoted arms which are movable toward and away from each other by fluid operators reacting between the arms nd the frame. A pair of complemental bucket members are pivoted to lower end of the respective arms for movement toward and away from each other independently of the pivotal movement of the arms. The bucket members are moved by fluid operators reacting between the arms and the bucket members. A suction pipe extends through the frame between the arms for picking up material loosened by the bucket members.
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