采用外螺旋肋片管实现高温侧强化传热后，再热器管壁温度升高，所需贵重金属耗量增加。
The temperature of the tube went up and then the expenditure of expensive alloy increased by using extern spiral finned tube, which enhanced the external heat transfer.
如果天文学家能够观测到十亿光年外的螺旋星云的金属丰度梯度，我们就可以知道亿万年之前的梯度有多大，因此也就可以知道它是如何随时间变化的。
If astronomers could observe metallicity gradients in spiral galaxies billions of light-years away, we could see how steep the gradients were billions of years ago and thus how they change over time.
除了扮演传统直升机角色外，还具有涡轮螺旋桨飞机的长距离、高速巡航性能。
It is designed to perform conventional helicopter missions but with the long-range, high-speed cruise performance of a turboprop aircraft.
其原因也许在于童年时期感染幽门螺旋杆菌能让免疫系统学会适当地反击外源抗原，这样长大后就不会因为反应过激而出现哮喘。
It could be that encountering Helicobacter as a kid teaches the immune system how to react, and not overreact as in asthma to future allergens.
双螺旋桨在向前推进时向内旋还是外旋？
建筑师利用了矗立在地面上的49块高低不同的钢板，打造出一个螺旋形封闭空间，除了卫生间隔间外，还设置了户外的洗手池部分。
By embedding 49 different panels into the ground, the team has created a spiralling plan that encloses a toilet cubicle, but also frames an outdoor area for hand washing.
从螺旋理论看，芳香轮烯和非芳香轮烯都是内消旋体和外消旋体的混合物，故都不呈现旋光性。
In the light of the helix theory, aromatic annulenes and non-aromatic annulcncs are all the mixture of the mesomer and raceme, so they haven't opticity activeity.
为减少射频螺旋电感的金属导体损耗，提出了一种电感金属线宽及金属间距从外到内逐渐变小的新颖结构。
To decrease the metal losses of RF spiral inductor, a novel layout structure with gradually reduced metal line width and space from outside to inside is presented.
论述螺旋面外铣、旋风铣两种情况刀具设计问题。
The problem of the design of the knife in milling helical face in and out is emphasized.
这些圆碟会发射出能量的光旋，它们其实不是圆碟状而是螺旋形的，但看起来外像是圆碟一样。
The discs emit energetic spirals. They are truly more spiral than disc, but they do appear disc- like when viewed.
腓骨的单纯螺旋骨折在此类骨折中最为常见（旋后外旋II度）。
The isolated spiral fracture of the fibula is the most common ankle fracture (supination-lateral rotation stage II).
本文建立了关于螺旋皱纹内、外导体同轴电缆特性阻抗不均匀性的理论。
In this paper a theory on the non-uniformity of characteristic impedance of coaxial cables with helical corrugated inner-and outer-conductors is proposed.
今天最常用的旋转泵是外齿轮泵、内齿轮泵、摆线转子泵、滑动叶片泵和螺旋泵。每种类型的泵都有优点，适合于特定场合的应用。
The most common rotary-pump designs used today are spur-gear, generated-rotary, sliding-vane, and screw pump, each type has advantages that make it the most suitable for a given application.
采用焊道错位叠加方法，再现了螺旋管双面埋弧焊制管过程中内、外焊焊接热影响区(HAZ)的焊接热循环。
In this paper the HAZ weld thermal cycles of the welding by both sides submerged arc welded steel pipe were reproduced by the dislocation overlap weld method.
近年的许多研究表明，幽门螺旋杆菌除引起胃肠疾病外，还与人类某些肝脏疾病的发生密切相关。
But recent researches indicated that helicobacter priori also has close relationship with some liver diseases besides gastrointestinal diseases.
我公司是专门生产船外发动机螺旋桨支架的厂家。
Our company produces the outboard motor propeller support's factory specially.
除选定滑动面为对数螺旋面—对数螺旋面—平面的形式外，没有其他任何的简化或假定。
Except that the selected sliding surface is formed by logarithmic helicoidal surface-logarithmic helicoidal surface-plane, no other simplifications or assumptions are made.
本文提出的变磁阻式螺旋桨动力仪除用于水面船模试验外，并可用于水下模型及多桨轴模型试验。
The R. P. D. is presented in this paper. Except the usual ship model test, it is possible to carry out measurement of tests for the underwater model and multi-propeller shaft model.
本文提出的变磁阻式螺旋桨动力仪除用于水面船模试验外，并可用于水下模型及多桨轴模型试验。
The R. P. D. is presented in this paper. Except the usual ship model test, it is possible to carry out measurement of tests for the underwater model and multi-propeller shaft model.
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