• 一些昆虫种类蚜虫,出现无个体,称为无

    In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

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  • 结果表明兰州地区豌豆性雌为无蚜均为有翅型

    The results showed that the ovipara of pea aphid in Lanzhou area were wingless, while males were winged.

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  • 分蘖期水稻饲养的褐飞虱短翅型比例明显高于孕穗期水稻饲养的褐飞虱。

    BPH feeding on rice plants at various stages have dfferent brachypterous ratios, tillering plants cause more brachypterous females than booting rice plants.

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  • HIMOD系列旗舰采用交互V管,采用了带螺纹铜管采用传统式盘管的机组更高传热效率

    HIMOD flagship series USES interactive "type v" coil, the internal thread copper tube and punched slotted fin, and heat transfer efficiency is higher than the traditional coil unit.

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  • 实验证明百叶窗式纳米亲水要比常规平板提高100%以上的换效果

    Experiments proved that the heat transfer efficiency of the louvered fin with nm hydrophilic film is 100% higher than the conventional straight fin.

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  • 肯韦尔XF- 92A条是第一个三角洲美国飞机。

    The Convair XF-92A was the first delta-winged aircraft for the United States.

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  • 证明该圆孔一种适用片管式制冷换热器传热效果优越的

    This kind of fin is applicable to the fin-tube cooling heat exchanger and the effect of heat transfer is perfect.

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  • 中温加热器采用片式电热元件高温加热器采用管状元件。

    Low and medium temperature heaters have wing shape heating elements and high temperature heater has tubular heating elements.

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  • 榕树桑科属)榕小蜂(昆虫纲:膜目:小蜂总科)研究适应雄性进化问题理想材料。

    Fig wasps (Insecta: Hymenoptera: Chalcidoidea) and their host figs (Moraceae: Ficus) is an excellent model for the study of such evolutionary topics as adaptation, male polymorphism, etc.

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  • 采用CD 40柴油机工作介质发动机冷却系统实际工况下,对21种几何尺寸的错列锯齿不锈钢进行了研究。

    With CD40 lubricating oil as work medium, under the engine cooling system work conditions, 21 geometrical schemes of stainless steel offset strip fins were studied.

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  • 通过数值模拟得出了X双向开缝效率计算曲线

    By numerical method, the fin efficiency curves for X-type two-side strip fin surfaces were achieved.

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  • 试验结果表明:X片的波动强度、流动阻力大于圆弧开缝片,但前者换热性能场协同性优于后者。

    The experiment results showed that the fluctuation intensity and pressure drop of the X-type slotted fin surface were higher t.

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  • 生物合成抑制剂1目昆虫

    Inhibitors of chitin biosynthesis, type 1, Homopteran.

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  • 补充生殖群体中,再次产生补充生殖,再生补充生殖蚁的品级出现补充生殖蚁。

    The sub stitue reproductive colony can produce substitute reproductive once more, and then there may appear substitute reproductive in wing-pad form.

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  • 这种蒸发器进行传热性能研究,式光板进行传热性能对比,实验结果表明,T液膜蒸发能在低温差下维持沸腾且有较高的给热系数。

    The heat performance of boiling for this evaporator has been studied and compared with that of falling film boiling and pool boiling on the smooth plate respectively.

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  • H鳍片换热器是一种新的换热器,具有较高的强化传热能力优良的不积灰性能,其应用日趋增多。

    So it has great practical significance to study the heat transfer and friction characteristics of the H-type finned tube heat exchanger.

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  • H鳍片换热器是一种新的换热器,具有较高的强化传热能力优良的不积灰性能,其应用日趋增多。

    So it has great practical significance to study the heat transfer and friction characteristics of the H-type finned tube heat exchanger.

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