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| 开孔孔口面积 | |||
| 孔径面积 | |||
| 开孔面积; 开口面积; 孔洞面积 | |||
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| 采光面积 | |||
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aperture area : 6 phrases in 5 subjects |
| General | 1 |
| Solar power | 1 |
| Space | 2 |
| Technology | 1 |
| Telecommunications | 1 |
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