The present invention deals with a double-cone device that produces enhanced suction, pressure amplification and reduced noise.
本发明涉及一种双圆锥设备，其产生了增强的抽吸、压力放大和降低的噪音。
The present invention deals with a double-cone device that produces enhanced suction, pressure amplification and reduced noise.
本发明涉及一种双圆锥设备，其产生了增强的抽吸、压力放大和降低的噪音。
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