대형 빌딩( 구내식당 하수구 막힘, 하수관/횡주관 막힘 ) 고압세척, 배관 내시경 검사 - 작업보고서

https://video.wixstatic.com/video/5e7b7c_250593e97d0d4a368d3c5e5ddc2531d2/1080p/mp4/file.mp4

https://video.wixstatic.com/video/5e7b7c_cb6d146385c643ff89e9619f549a7ef9/1080p/mp4/file.mp4

https://video.wixstatic.com/video/5e7b7c_6c44c93df18d41fc9d05fe1102d05159/1080p/mp4/file.mp4