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air ion |
空气离子 : 17 phrases in 14 subjects |
Agriculture | 2 |
Aviation | 1 |
Construction | 1 |
Desert science | 1 |
Earth sciences | 1 |
Ecology | 1 |
Electronics | 1 |
General | 2 |
Household appliances | 1 |
Metallurgy | 2 |
Nursing | 1 |
Space | 1 |
Technology | 1 |
Textile industry | 1 |