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People often use (e________ ) to carry the heavy things.填空,带

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People often use (e________ ) to carry the heavy things.填空,带翻译.
People often use (e________ ) to carry the heavy things.填空,带
elevators
A mechanism,often with buckets or scoops attached to a conveyor,used for hoisting materials.
吊车:一种通常配有联接在传送带上的吊桶或戽斗,用来举起材料
人们常常用吊车举起重物.