철도 궤도 교체 작업 Amazing railway track replace rails and sleepers(VIDEO)
산업과학 Construction,Science/건설영상 Video2015. 2. 12. 11:49
[VIDEO]
https://www.youtube.com/watch?v=xuEefyIAO9k
edited by kcontents
"from past to future"
데일리건설뉴스 construction news
콘페이퍼 conpaper
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