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燃油碳氢比 (ratio) |
hydrogen /carbon : 33 phrases in 12 subjects |
Automobiles | 4 |
Aviation | 1 |
Chemistry | 3 |
Earth sciences | 2 |
Electronics | 3 |
Engineering geology | 1 |
Geology | 3 |
Geophysics | 1 |
Metallurgy | 3 |
Oil / petroleum | 3 |
Oil processing plants | 1 |
Technology | 8 |