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工 字形 : 75 phrases in 10 subjects |
Agriculture | 1 |
Architecture | 2 |
Automobiles | 8 |
Bridge construction | 4 |
Engineering geology | 2 |
General | 1 |
Hydroelectric power stations | 3 |
Metallurgy | 14 |
Oil / petroleum | 1 |
Technology | 39 |