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axis of revolution |
绕转轴 : 29 phrases in 13 subjects |
Automobiles | 2 |
Aviation | 1 |
Construction | 2 |
General | 4 |
Gymnastics | 3 |
Hydroelectric power stations | 1 |
Metallurgy | 4 |
Oil / petroleum | 1 |
Plastics | 1 |
Rail transport | 1 |
Space | 1 |
Technology | 7 |
Wind Energy | 1 |