 |
| |||
| pyramid architecture | |||
| pyramid structure | |||
| conical structure | |||
| tapered structure | |||
|
锥形 结 构 : 8 phrases in 5 subjects |
| Animal husbandry | 1 |
| Earth sciences | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Technology | 3 |
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