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1)  tubes with pin fins
钉头管钉
2)  nailhead furnace tube
钉头炉管
1.
In the long-term operation of atmospheric and vacuum heat furnace that use vacuum heavy oil as fuel,thesurface of nailhead furnace tube in the convection chamber was seriously deposited.
以减压渣油为燃料的常减压加热炉在长期生产运行过程中,对流室钉头炉管表面结垢严重。
3)  pin tube
钉头管
1.
The traditional manufacturing method of pin tube, which pin is loaded by manual and welt by ordinary weld gun, with heavy labor intensity, low productivity, high energy consumption and instable welding quality.
钉头管是一种通过在光管外表面上焊接钉头的方法加工成型的换热元件,它广泛应用于石油、化工等行业的工业加热炉的对流段内,满足管内和管外不同流体传热的需要。
4)  pin finned drop shaped tube
滴形钉头管
1.
The experimental research of the hydraulic resistance within Re =1×10 4~1×10 5 is carried out for the pin finned drop shaped tube at different attack angles by means of the wind tunnel .
利用风洞实验 ,研究了Re =1× 10 4~ 1× 10 5范围内滴形钉头管在不同攻角下的流阻特性 。
5)  Elliptic Pin Tube
椭圆钉头管
6)  Soil head
钉头
补充资料:钉头果
     (气球唐棉) 
    形态特征:萝摩科钉头果属灌木植物。具乳汁。叶对生或轮生,条形,长6-10厘米,宽5-8毫米。聚伞花序生于枝的项端叶腋间,长4-6厘米,有花3-7朵;花红色,兜状。骨突果肿胀,圆形或卵圆形,长5-6厘米,直径约3厘米;外果皮有软刺,刺长1厘米。种子卵形,顶端具白绢质种毛。
    生境分布:原产于非洲,华北及云南有栽培。
    用途:全株浸膏可制小儿肠胃病,茎片作催嚏剂,叶可治肺痨等。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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