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渗 氮 : 181 phrases in 15 subjects |
Agriculture | 1 |
Automobiles | 29 |
Aviation | 2 |
Compressors | 1 |
Electric machinery | 1 |
Electronics | 4 |
General | 3 |
Hydroelectric power stations | 1 |
Metallurgy | 105 |
Nautical | 2 |
Oil / petroleum | 2 |
Plastics | 2 |
Space | 6 |
Steel production | 6 |
Technology | 16 |