在制冷系统中，换热器是主要的组成部件。
Heat exchangers are the main components in refrigeration system.
而管板是管壳式换热器中最重要也是最复杂的承压部件。
Tubesheet is the most important and complicated part of tube-and-shell heat exchanger.
而管板是管壳式换热器中最重要也是最复杂的承压部件。
Tubesheet is the most important and complicated part of shell-and-tube heat exchanger.
新风换气机是调节空气品质的重要设备，换热器是新风换气机的关键部件。
The fresh air ventilator is an important equipment of air's quality regulating.
新风换气机是调节空气品质的重要设备，换热器是新风换气机的关键部件。
The fresh air ventilator is an important equipment of air's quality regulating.
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