该肯韦尔XF型- 92A条是第一个三角洲翅的美国飞机。
The Convair XF-92A was the first delta-winged aircraft for the United States.
然后通过三种限制条件对不同翅片间距、不同管排数和不同管数下的换热板芯的传热性能进行了比较。
The comparison of heat transfer performance with three different fin spacing, three different Numbers of tube rows and three different Numbers of tubes under three constraints is carried out.
翅买家可能规定三件产品的平均结果必须达到一个确定的水平。
The buyer might state that the average result of 3 pieces tested must be a certain level.
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