heating-ventilating-air conditioning system
heating-ventilating-air conditioning system
采暖-通风-空调系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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In heating, ventilating, air conditioning and other engineering system, there are many problems concerned with convection heat transfer.
在供热、供燃气、通风与空调以及其它许多工程系统中，对流换热问题广泛存在。
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