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极限 pH 值 : 100 phrase in 30 subjects |
| Agriculture | 2 |
| Animal husbandry | 1 |
| Automobiles | 8 |
| Aviation | 3 |
| Bridge construction | 1 |
| Business | 3 |
| Chemistry | 2 |
| Drilling | 3 |
| Ecology | 1 |
| Economy | 2 |
| Electric machinery | 1 |
| Electronics | 14 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 1 |
| Genetics | 1 |
| Geophysics | 2 |
| Information technology | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Perfume | 1 |
| Plastics | 3 |
| Polymers | 1 |
| Project management | 1 |
| Rail transport | 1 |
| Space | 6 |
| Technology | 31 |
| Telecommunications | 1 |
| Textile industry | 1 |
| Wind Energy | 2 |
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