泄洪洞
- 网络spillway tunnel; flood discharge tunnel
泄洪洞
泄洪洞
spillway tunnel
泄洪冲砂闸,sluice... ... ) spillway tunnel 泄洪洞 ) flood discharge tunnel 泄洪洞 ...
flood discharge tunnel
泄洪冲砂闸,sluice... ... ) spillway tunnel 泄洪洞 ) flood discharge tunnel 泄洪洞 ...
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