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critical ratio: 38 phrases in 13 subjects |
Automobiles | 1 |
Aviation | 2 |
Bridge construction | 1 |
Desert science | 1 |
Electronics | 4 |
Engineering geology | 2 |
Metallurgy | 6 |
Oil / petroleum | 1 |
Otorhinolaryngology | 2 |
Plastics | 1 |
Space | 2 |
Technology | 14 |
Textile industry | 1 |