本文在综合考虑传热性能和摩擦阻力等因素的基础上，对单螺旋槽套管式冷凝器的结构进行了优化和研究。
On the base of both consideration of heat transfer performance and resistance, the optimization and research are carried out on single spiral duct double pipe condenser.
本文讨论了在传热计算中螺旋板换热器与单壳程、单管程列管式换热器的差异。
The difference of heat transfer calculation between spiral plate heat exchanger and single shell and tube heat exchange is discussed in the article.
该螺旋分级机分有：高堰式单螺旋分级机、高堰式双螺旋分级机、沉没式单螺旋分级机、沉没式双螺旋分级机。
The spiral classifier divided: high weir single spiral classifier, high-Weir type dual spiral classifier, spiral classifier single sink, sinking double spiral classifier.
该螺旋分级机分有：高堰式单螺旋分级机、高堰式双螺旋分级机、沉没式单螺旋分级机、沉没式双螺旋分级机。
The spiral classifier divided: high weir single spiral classifier, high-Weir type dual spiral classifier, spiral classifier single sink, sinking double spiral classifier.
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