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air return vent | |||
exhaust inlet; return air grill; return inlet | |||
air return inlet; air return opening; return air inlet; return air intake; return intake |
回风口 : 17 phrases in 5 subjects |
General | 1 |
Metallurgy | 3 |
Refrigeration | 7 |
Technology | 5 |
Wind Energy | 1 |