상업공간-빌딩(수도 녹물제거 - 배관 플러싱 작업) 작업보고서

https://video.wixstatic.com/video/5e7b7c_69078212016e4828ba866b7a83937149/1080p/mp4/file.mp4

https://video.wixstatic.com/video/5e7b7c_fc41103a48d34be0b4b2c51a862cf54c/1080p/mp4/file.mp4