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| 三丝式保护渣层厚度测定法 | |||
| flux: 19 phrases in 10 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Earth sciences | 2 |
| Ecology | 1 |
| Electric machinery | 3 |
| Electronics | 4 |
| General | 1 |
| Metallurgy | 2 |
| Space | 1 |
| Technology | 3 |
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