加热部件有螺旋盘管和镶铸铝，提供了最大的高效性。
The heating element is integrated with a helically coiled tube and cast-in aluminum for maximum efficiency.
本文对大型螺旋盘管机的原理及构造作一分析介绍，阐明其适用性和使用要求。
The principles and the structure of large spiral coiling tube machine were introduced and analyzed in this article. At the same times, the adaptability and application requirement were stated.
通过制氢装置中的设备——原料预热器的制作，介绍了铬钼钢螺旋盘管和焊接垫片的成型及焊接、无损检测等工艺过程，实现了此类产品的国产化，并为类似产品的制造提供了借鉴。
The article based on fabrication process of the pre-heater which is the equipment of hydrogen manufacturing unit, and the forming of Cr-Mo steel coil and welding gasket was analyzed.
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