Uses the ripple furnace tube , and the thread smoke tube, increased the heat transfer effect, enhances the boiler thermal efficiency;

采用波纹炉胆和螺纹烟管，增加了传热效果，提高了热效率；

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It is about the ring screw thread smoke channel of the boiler shell type gas tube in the boiler field.

锅壳式烟管锅炉烟管内置水管的环形螺纹烟道，它涉及锅炉领域。

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This paper has mainly introduced when using arch tube-plate and screw smoke-tube to reform the DZ-type horizontal packaged boiler. Good results of saving on energy has been got.

文章介绍了采用拱形管板和螺纹烟管技术对DZ卧式快装锅炉加以改造，取得良好节能效果。

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Nicky Morgan, MP for Loughborough, heard an "enormous bang" as she walked towards Vauxhall Tube before seeing "clouds of black smoke".

BBC: England

Christopher Jen was at Vauxhall Tube station on his way to his marketing job when he spotted smoke rising nearby.

CNN: 2 killed as helicopter crashes into crane in central London