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하천

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토목직 공무원 | 2 videos | Updated 5 years ago
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1:53

What restrictions will be imposed on activities in designated river and small river areas?

토목직 공무원

2:44

하천, 소하천, 공유수면의 점용허가는 어떻게 구분할 수 있을까?

토목직 공무원

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