stage compression meaning in English

多级压缩
分级压缩

Two - stage compression cycle for water heaters in air source heat pumps
空气源热泵热水器双级压缩循环研究
Compound stage compression
复级压缩
Single stage compression
单级压缩
Two stage compression
二级压缩
Comparison on performances of cascade heat pump and two - stage compression heat pump for freeze - dryer
23自动复叠制冷循环的特性研究

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