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a rope is passed through a pulley, one end being fastened to a bucket and the other end harnessed to the animal, with two operators, one unloading the bucket and the other taking care of the animal.
将绳子穿过一个滑轮,一端拴住水桶,另一端套在役畜上,配以两个操作人员,一人负责倒水,另一人照管牲畜。