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structural symmetry | |||
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structure symmetry |
结构对称 : 34 phrases in 10 subjects |
Bridge construction | 4 |
Electronics | 7 |
Hydroelectric power stations | 2 |
Information technology | 1 |
Metallurgy | 4 |
Oil / petroleum | 1 |
Plastics | 1 |
Rail transport | 2 |
Technology | 10 |
Telecommunications | 2 |