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force diagram |
力图解 : 40 phrases in 11 subjects |
Agriculture | 3 |
Aviation | 5 |
Bridge construction | 3 |
Business | 1 |
Earth sciences | 2 |
Electronics | 1 |
Engineering geology | 1 |
General | 1 |
Oil / petroleum | 1 |
Technology | 21 |
United Nations | 1 |