一个通道在第二喷嘴管的近端和远端之间延伸，并且该通道与燃料源和所述孔流体连接。
A passageway extends between the proximal end and the distal end of the second nozzle tube, with the passageway fluidly connecting to the fuel source and the aperture.
外置式喷嘴机构包括三通阀，分别连接出汽管道末端、饮料管和喷嘴。
The external nozzle mechanism comprises a three-way valve for connecting the tail end of the steam outlet pipeline, a beverage straw and a nozzle respectively.
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