一些昆虫种类,如蚜虫,出现无翅个体,被称为无翅型。
In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.
结果表明:兰州地区豌豆蚜性雌蚜均为无翅型,而雄蚜均为有翅型。
The results showed that the ovipara of pea aphid in Lanzhou area were wingless, while males were winged.
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.
HIMOD系列旗舰型采用了交互“V型”盘管,采用了带内螺纹的铜管及冲缝型翅片,比采用传统式盘管的机组有更高的传热效率。
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.
实验证明百叶窗式纳米亲水翅片要比常规的平板型翅片提高100%以上的换热效果。
Experiments proved that the heat transfer efficiency of the louvered fin with nm hydrophilic film is 100% higher than the conventional straight fin.
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.
证明该圆孔翅片是一种适用于翅片管式制冷换热器且传热效果优越的片型。
This kind of fin is applicable to the fin-tube cooling heat exchanger and the effect of heat transfer is perfect.
低、中温型加热器采用翅片式电热元件,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.
榕树(桑科:榕属)和榕小蜂(昆虫纲:膜翅目:小蜂总科)是研究适应、雄性多型等进化问题的理想材料。
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.
采用CD 40柴油机油为工作介质,在发动机冷却系统实际工况下,对21种几何尺寸的错列锯齿型不锈钢翅片进行了研究。
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.
通过数值模拟得出了X型双向开缝翅片的效率计算曲线。
By numerical method, the fin efficiency curves for X-type two-side strip fin surfaces were achieved.
试验结果表明:X型开缝翅片的波动强度、流动阻力大于圆弧型开缝翅片,但前者的换热性能和场协同性优于后者。
The experiment results showed that the fluctuation intensity and pressure drop of the X-type slotted fin surface were higher t.
几丁质生物合成抑制剂,1型,同翅目昆虫。
在补充生殖蚁群体中,能再次产生补充生殖蚁,再生补充生殖蚁的品级可出现翅芽型补充生殖蚁。
The sub stitue reproductive colony can produce substitute reproductive once more, and then there may appear substitute reproductive in wing-pad form.
对这种蒸发器进行了传热性能的研究,并与池式光板进行传热性能对比,实验结果表明,T型翅片板降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.
H型鳍片管换热器是一种新的翅片型式的换热器,具有较高的强化传热能力和优良的不积灰性能,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.
H型鳍片管换热器是一种新的翅片型式的换热器,具有较高的强化传热能力和优良的不积灰性能,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.
应用推荐