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main tower; pylon | |||
central tower; main column | |||
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king-tower | |||
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king-tower | |||
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king tower | |||
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king tower |
主塔 : 33 phrases in 8 subjects |
Architecture | 1 |
Bridge construction | 2 |
General | 2 |
Oil / petroleum | 2 |
Oil processing plants | 1 |
Polymers | 1 |
Project management | 1 |
Technology | 23 |