【单选题】【消耗次数:1】
柱塞泵可分为径向柱塞泵和( )两在类。
齿轮泵
叶片泵
轴向柱塞泵
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①  正确
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【判断题】 柱塞泵是靠柱塞在缸体中作往复运动造成密封容积的变化来实现吸油与压油的液压泵。该说法( )
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