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| M M 的符号 | |||
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symbol for : 18 phrases in 9 subjects |
| Agriculture | 1 |
| Automobiles | 5 |
| Aviation | 1 |
| Earth sciences | 1 |
| Economy | 1 |
| General | 3 |
| Project management | 1 |
| Rail transport | 1 |
| Technology | 4 |
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