Condensers, for matching steam turbines in power plants, are mostly of the double pass type, with cooling water either entering at top and leaving at bottom or vice versa.
电站汽轮机配备的凝汽器大多采用双流程，冷却水的流径有上进下出和下进上出之分。
The external heated singeing machine adopts the new type of double-slit radiant high-efficiency burner to heat the roller, fabrics pass through the hot surface of the roller for contact singeing.
外热式圆筒烧毛机采用新型双狭缝辐射式高效火口加热圆筒，使织物经过灼热的圆筒表面进行接触式烧毛。
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