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肋板 : 260 phrases in 14 subjects |
Architecture | 14 |
Automobiles | 7 |
Bridge construction | 10 |
Engineering geology | 3 |
General | 3 |
Hydroelectric power stations | 2 |
Metallurgy | 3 |
Nautical | 5 |
Oil / petroleum | 5 |
Plastics | 2 |
Refrigeration | 1 |
Shipbuilding | 3 |
Technology | 201 |
Wind Energy | 1 |