An entropy generation based thermodynamic analysis was conducted of the internal flows in circular and flat tubes.

对圆管和扁管内部流动进行了以熵产生为基础的热力学分析。

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Refrigerant flow maldistribution in multiple flat tubes is important for microchannel heat exchanger, which leads to performance deterioration and capacity degradation.

管内制冷剂流量分配不均对微通道换热器有重要影响，会导致其能力退化。

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The structure and making technology of hard alloy die used for continuously extruding multi - port aluminium flat tubes are analyzed. The way of making die and the process parameters are introduced.

分析了连续挤压多通道铝扁管用硬质合金模具的结构及加工工艺性，对该种模具的加工方法和加工电参数进行了介绍。

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The last century has seen only a few major display innovations, among them the move from black-and-white monitors to color and the introduction of flat, liquid crystal displays to replace cathode ray tubes.

FORBES: Seeing the Light

Inspired by the traffic that hummed through the intersection outside their Zurich flat, the Freitag brothers designed a courier bag made of old truck tarpaulins, used bicycle inner tubes and car seat belts.

BBC: The stranger side of Switzerland