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stand structure
| regulation
| stand structure | |
| desert. | 群落地段结构 |
| forestr. | 林分结构 |
| regulation | |
| environ. | 管理 |
| hydroel.st. | 条例 |
| hydrol. | 急流河槽控制 |
| patents. | 法规 |
| |||
| 群落地段结构 | |||
| 林分结构 | |||
| 林分组成; 试车台结构 | |||
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stand structure regulation : 7 phrases in 4 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Ecology | 4 |
| Navigation | 1 |
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